28890 (number)
28,890 (twentyeight thousand eight hundred ninety) is an even fivedigits composite number following 28889 and preceding 28891. In scientific notation, it is written as 2.889 × 10^{4}. The sum of its digits is 27. It has a total of 6 prime factors and 32 positive divisors. There are 7,632 positive integers (up to 28890) that are relatively prime to 28890.
Basic properties
 Is Prime? No
 Number parity Even
 Number length 5
 Sum of Digits 27
 Digital Root 9
Name
Short name  28 thousand 890 

Full name  twentyeight thousand eight hundred ninety 
Notation
Scientific notation  2.889 × 10^{4} 

Engineering notation  28.89 × 10^{3} 
Prime Factorization of 28890
Prime Factorization 2 × 3^{3} × 5 × 107
Composite numberω(n)  Distinct Factors  4  Total number of distinct prime factors 

Ω(n)  Total Factors  6  Total number of prime factors 
rad(n)  Radical  3210  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  0  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 28,890 is 2 × 3^{3} × 5 × 107. Since it has a total of 6 prime factors, 28,890 is a composite number.
Divisors of 28890
32 divisors
τ(n)  Total Divisors  32  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  77760  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  48870  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  2430  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  169.97058569058  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  11.888888888889  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 28,890 can be divided by 32 positive divisors (out of which 16 are even, and 16 are odd). The sum of these divisors (counting 28,890) is 77,760, the average is 2,430.
Other Arithmetic Functions (n = 28890)
φ(n)  Euler Totient  7632  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  1908  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 3142  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 7,632 positive integers (less than 28,890) that are coprime with 28,890. And there are approximately 3,142 prime numbers less than or equal to 28,890.
Divisibility of 28890
m  2  3  4  5  6  7  8  9 

n mod m  0  0  2  0  0  1  2  0 
The number 28,890 is divisible by 2, 3, 5, 6 and 9.
Classification of 28890
By Arithmetic functions
 Arithmetic
 Abundant
Expressible via specific sums
 Polite
 Practical
Base conversion (28890)
Base  System  Value 

2  Binary  111000011011010 
3  Ternary  1110122000 
4  Quaternary  13003122 
5  Quinary  1411030 
6  Senary  341430 
8  Octal  70332 
10  Decimal  28890 
12  Duodecimal  14876 
16  Hexadecimal  70da 
20  Vigesimal  3c4a 
36  Base36  mai 
Basic calculations (n = 28890)
Multiplication
n×yn×2  57780 

n×3  86670 
n×4  115560 
n×5  144450 
Division
n÷yn÷2  14445.000 

n÷3  9630.000 
n÷4  7222.500 
n÷5  5778.000 
Exponentiation
n^{y}n^{2}  834632100 

n^{3}  24112521369000 
n^{4}  696610742350410000 
n^{5}  20125084346503344900000 
Nth Root
^{y}√n^{2}√n  169.97058569058 

^{3}√n  30.68427365309 
^{4}√n  13.037276774334 
^{5}√n  7.8009861773102 
28890 as geometric shapes
Circle
Radius = nDiameter  57780 

Circumference  181521.22352442 
Area  2622074073.8102 
Sphere
Radius = nVolume  1.0100229332317E+14 

Surface area  10488296295.241 
Circumference  181521.22352442 
Square
Length = nPerimeter  115560 

Area  834632100 
Diagonal  40856.629816959 
Cube
Length = nSurface area  5007792600 

Volume  24112521369000 
Space diagonal  50038.947830665 
Equilateral Triangle
Length = nPerimeter  86670 

Area  361406300.70698 
Altitude  25019.473915332 
Triangular Pyramid
Length = nSurface area  1445625202.8279 

Volume  2841687895254.2 
Height  23588.586223002 
Cryptographic Hash Functions
md5  2607a30a2be67d96768aa3dbe1cc7731 

sha1  94f38467ab8c8f89fba2fab837abbc0de18ed8cd 
sha256  235e005301effbe8277662ee158a46675dd089112147833ec705631cbe057954 
sha512  764b09da94206504615213e4ae896f00927da4a5fb7fddff813808cc4cb0f6b8495f906facfc028deeb11e4298a33fab8574686ebff968df48e83f3b61e23c85 
ripemd160  1817128914cfe6e3af98e350993ae3e3946918af 