28931721 (number)

28931721 is an odd 8-digits composite number following 28931720 and preceding 28931722. In scientific notation, it is written as 2.8931721 × 10^7. The sum of its digits is 33. It has a total of 4 prime factors and 16 positive divisors. There are 15260544 positive integers (up to 28931721) that are relatively prime to 28931721.

Interesting facts

Basic properties

Name

Name twenty-eight million nine hundred thirty-one thousand seven hundred twenty-one

Notation

Scientific notation 2.8931721 × 10^7
Engineering notation 2.8931721 × 10^6

Prime Factorization of 28931721

Prime Factorization 7 × 3 × 13 × 105977

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 28931721
Product of the distinct prime numbers

The prime factorization of 28931721 is 7 × 3 × 13 × 105977. Since it has a total of 4 prime factors.

Most popular turbo-numbers

9, 7, 6, 12, 167, 379, 7884, 8875, 30355, 96180, 811327, 369858, 5180824, 2456942, 42276685, 56043148, 776867299, 371395209, 7603325570, 461128767

Basic calculations (n = 28931721)

Multiplication

n×y
n×2 57863442
n×3 86795163
n×4 115726884
n×5 144658605

Division

n÷y
n÷2 14465860.5
n÷3 9643907
n÷3 7232930.25
n÷5 5786344.2

Exponentiation

ny
n2 837044480021841
n3 2.4217137360582E+22
n4 7.0064346153503E+29
n5 2.0270821149606E+37

Nth Root

y√n
2√n 5378.8215252042
3√n 306.99037271709
4√n 73.340449447792
5√n 31.06525004956

Divisors of 28931721

1, 3, 7, 13, 21, 39, 91, 273, 105977, 317931, 741839, 1377701, 2225517, 4133103, 9643907, 28931721

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -28931720
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 28931721 can be divided by 16 positive divisors. The sum of these divisors (counting 28931721) is 1, the average is 0.0625.

Base conversion 28931721

Base System Value
2 Binary 1101110010111011010001001
3 Ternary 2000102212212020
4 Quaternary 1232113122021
5 Quinary 24401303341
6 Senary 2512035053
8 Octal 156273211
10 Decimal 28931721
12 Duodecimal 9832a89
16 Hexadecimal 1b97689
20 Vigesimal 90g961
36 Base36 h83ux

Cryptographic Hash Functions

md5 ce469ac44942219ce7d57828b2c43cf6
sha1 97a8d99b51b2839467a677fac00842e0d7bd2d98
sha256 cf60c60b6d7dc2148a24b2387c14b15ef5b30656ada5952c6ff7aa57602fc090
sha512 8f95af50e122fde89e364e31718c8f078a3d850f320e4ced2cb2074786060e3328a8be597bb0c13835cc61909824b317ed34624a308cd92a6af84907a1c61fb3
ripemd-160 4b9b6b954dd3819a51d3fda3520686684ca6d4fc

28931721 as geometric shapes

Circle

Radius = n
Diameter 57863442
Circumference 181783364.29862
Area 2.6296527891645E+15

Sphere

Radius = n
Volume 1.0144050776397E+23
Surface area 1.0518611156658E+16
Circumference 181783364.29862

Square

Length = n
Perimeter 115726884
Area 837044480021841
Diagonal 40915632.220994

Cube

Length = n
Surface area 5022266880131046
Volume 2.4217137360582E+22
Space diagonal 50111210.722407

Equilateral Triangle

Length = n
Perimeter 86795163
Area 3.6245089189823E+14
Altitude 25055605.361204

Triangular Pyramid

Length = n
Surface area 3.6245089189823E+14
Volume 2.8540170080989E+21
Height 13638544.073665