21491728 (number)

21491728 is an even 8-digits composite number following 21491727 and preceding 21491729. In scientific notation, it is written as 2.1491728 × 10^7. The sum of its digits is 34. It has a total of 5 prime factors and 10 positive divisors. There are 10745856 positive integers (up to 21491728) that are relatively prime to 21491728.

Interesting facts

Basic properties

Name

Name twenty-one million four hundred ninety-one thousand seven hundred twenty-eight

Notation

Scientific notation 2.1491728 × 10^7
Engineering notation 2.1491728 × 10^6

Prime Factorization of 21491728

Prime Factorization 2 × 2 × 2 × 2 × 1343233

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 2686466
Product of the distinct prime numbers

The prime factorization of 21491728 is 2 × 2 × 2 × 2 × 1343233. Since it has a total of 5 prime factors.

Most popular turbo-numbers

3, 6, 7, 35, 692, 752, 4733, 8460, 69757, 99800, 672553, 408160, 7385940, 2699412, 54118560, 29617025, 360581919, 114515351, 1894731474, 9557627818

Basic calculations (n = 21491728)

Multiplication

n×y
n×2 42983456
n×3 64475184
n×4 85966912
n×5 107458640

Division

n÷y
n÷2 10745864
n÷3 7163909.3333333
n÷3 5372932
n÷5 4298345.6

Exponentiation

ny
n2 461894372425984
n3 9.9269082169099E+21
n4 2.1334641127879E+29
n5 4.58518304098E+36

Nth Root

y√n
2√n 4635.9171692342
3√n 278.02922246855
4√n 68.087569858486
5√n 29.272126082353

Divisors of 21491728

1, 2, 4, 8, 16, 1343233, 2686466, 5372932, 10745864, 21491728

10 divisors

τ Total Divisors 10
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21491727
Sum of the proper positive divisors of n
A Arithmetic Mean 0.1
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 10
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21491728 can be divided by 10 positive divisors. The sum of these divisors (counting 21491728) is 1, the average is 0.1.

Base conversion 21491728

Base System Value
2 Binary 1010001111111000000010000
3 Ternary 1111102220002221
4 Quaternary 1101333000100
5 Quinary 21000213403
6 Senary 2044350424
8 Octal 121770020
10 Decimal 21491728
12 Duodecimal 7245414
16 Hexadecimal 147f010
20 Vigesimal 6e6968
36 Base36 csn4g

Cryptographic Hash Functions

md5 7be8b6577e5304b0bfc43ba4414ee51b
sha1 335f721339a1202f4fb527d35ca8f7eaad4f048d
sha256 801232ffce7b8d4cc12af1efbee39f6c9a7e4ef374af124d42947bbe5688a972
sha512 4150ef2943d18ac09ae939ff28b2913c7b4c22729c3f48db3c43cd9a25ab66eb5c6c0f0671ce1ad34479fc514405a79bca44714007b822440e1a1a35b67befd9
ripemd-160 f81020bbae736c83fb3e61e56d9047e3aba60f12

21491728 as geometric shapes

Circle

Radius = n
Diameter 42983456
Circumference 135036509.5955
Area 1.4510839671479E+15

Sphere

Radius = n
Volume 4.1581735902806E+22
Surface area 5.8043358685918E+15
Circumference 135036509.5955

Square

Length = n
Perimeter 85966912
Area 461894372425984
Diagonal 30393893.216434

Cube

Length = n
Surface area 2771366234555904
Volume 9.9269082169099E+21
Space diagonal 37224764.838451

Equilateral Triangle

Length = n
Perimeter 64475184
Area 2.0000613019299E+14
Altitude 18612382.419225

Triangular Pyramid

Length = n
Surface area 2.0000613019299E+14
Volume 1.1698973527322E+21
Height 10131297.738811