21781438 (number)

21781438 is an even 8-digits composite number following 21781437 and preceding 21781439. In scientific notation, it is written as 2.1781438 × 10^7. The sum of its digits is 34. It has a total of 3 prime factors and 8 positive divisors. There are 9334896 positive integers (up to 21781438) that are relatively prime to 21781438.

Interesting facts

Basic properties

Name

Name twenty-one million seven hundred eighty-one thousand four hundred thirty-eight

Notation

Scientific notation 2.1781438 × 10^7
Engineering notation 2.1781438 × 10^6

Prime Factorization of 21781438

Prime Factorization 2 × 7 × 1555817

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 21781438
Product of the distinct prime numbers

The prime factorization of 21781438 is 2 × 7 × 1555817. Since it has a total of 3 prime factors.

Most popular turbo-numbers

Basic calculations (n = 21781438)

Multiplication

n×y
n×2 43562876
n×3 65344314
n×4 87125752
n×5 108907190

Division

n÷y
n÷2 10890719
n÷3 7260479.3333333
n÷3 5445359.5
n÷5 4356287.6

Exponentiation

ny
n2 474431041347844
n3 1.0333790312394E+22
n4 2.250848129944E+29
n5 4.9026708989791E+36

Nth Root

y√n
2√n 4667.0588168567
3√n 279.2729351222
4√n 68.315875291595
5√n 29.350622025803

Divisors of 21781438

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21781437
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21781438 can be divided by 8 positive divisors. The sum of these divisors (counting 21781438) is 1, the average is 0.125.

Base conversion 21781438

Base System Value
2 Binary 1010011000101101110111110
3 Ternary 1111222121111221
4 Quaternary 1103011232332
5 Quinary 21034001223
6 Senary 2054503554
8 Octal 123055676
10 Decimal 21781438
12 Duodecimal 7364bba
16 Hexadecimal 14c5bbe
20 Vigesimal 6g2dbi
36 Base36 cyuny

Cryptographic Hash Functions

md5 4def77b0814283dfaa797809941f3d7c
sha1 1ceaa1f2dca8290360b477f9c090c19ce3c7e458
sha256 dc52f333ddb7772d4277bf636e8406139a3fa37be9019dc81260e3ce72faf9f3
sha512 b2043b45f9f55a9d0d6a4b76029673f46500158438f1524271d31151deb2d72a057b6ad738f406e4c2b5f76fded20463221b9c0f810e72178f194fd56bada642
ripemd-160 ff0a80702fc41eb7636ca449255b6229cf088acc

21781438 as geometric shapes

Circle

Radius = n
Diameter 43562876
Circumference 136856811.21084
Area 1.4904690741333E+15

Sphere

Radius = n
Volume 4.328607963887E+22
Surface area 5.9618762965334E+15
Circumference 136856811.21084

Square

Length = n
Perimeter 87125752
Area 474431041347844
Diagonal 30803605.027589

Cube

Length = n
Surface area 2846586248087064
Volume 1.0333790312394E+22
Space diagonal 37726557.277911

Equilateral Triangle

Length = n
Perimeter 65344314
Area 2.0543466707557E+14
Altitude 18863278.638956

Triangular Pyramid

Length = n
Surface area 2.0543466707557E+14
Volume 1.2178488675422E+21
Height 10267868.34253