81689938 (number)

81689938 is an even 8-digits composite number following 81689937 and preceding 81689939. In scientific notation, it is written as 8.1689938 × 10^7. The sum of its digits is 52. It has a total of 4 prime factors and 16 positive divisors. There are 36267840 positive integers (up to 81689938) that are relatively prime to 81689938.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred eighty-nine thousand nine hundred thirty-eight

Notation

Scientific notation 8.1689938 × 10^7
Engineering notation 8.1689938 × 10^6

Prime Factorization of 81689938

Prime Factorization 2 × 11 × 43 × 86353

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81689938
Product of the distinct prime numbers

The prime factorization of 81689938 is 2 × 11 × 43 × 86353. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 5, 17, 42, 630, 157, 2761, 5268, 4397, 30690, 825322, 264595, 7659742, 8263201, 38773404, 33305328, 436708922, 980404608, 8374417749, 4682621378

Basic calculations (n = 81689938)

Multiplication

n×y
n×2 163379876
n×3 245069814
n×4 326759752
n×5 408449690

Division

n÷y
n÷2 40844969
n÷3 27229979.333333
n÷3 20422484.5
n÷5 16337987.6

Exponentiation

ny
n2 6673245970443844
n3 5.4513704958431E+23
n4 4.4532211782045E+31
n5 3.6378336194781E+39

Nth Root

y√n
2√n 9038.2486135313
3√n 433.89987213519
4√n 95.069703973092
5√n 38.23258945001

Divisors of 81689938

1, 2, 11, 22, 43, 86, 473, 946, 86353, 172706, 949883, 1899766, 3713179, 7426358, 40844969, 81689938

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 -81689937
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 81689938 can be divided by 16 positive divisors. The sum of these divisors (counting 81689938) is 1, the average is 0.0625.

Base conversion 81689938

Base System Value
2 Binary 100110111100111110101010010
3 Ternary 12200201021112021
4 Quaternary 10313213311102
5 Quinary 131403034223
6 Senary 12034522054
8 Octal 467476522
10 Decimal 81689938
12 Duodecimal 2343632a
16 Hexadecimal 4de7d52
20 Vigesimal 15ab4gi
36 Base36 1cmwcy

Cryptographic Hash Functions

md5 4128c9671520b58ddd071452cd194821
sha1 44fe2feb036f22a02c83bb1bbc1116bcf7ec18ed
sha256 3e62c1ca4366853ec879b8b3278362c9ddb9d592b26b71a6c6bbf36f4ef37c37
sha512 c140edd9a8079e14911ba90517d9d1af77ad6a6bcae9be95e861ea3e5ed335299b63e1a7e1846b1961037c92df15395573a90e94e4158adf18a7f9d805718935
ripemd-160 7d057c0c8714006618b25eac6e2262f2536c8a0f

81689938 as geometric shapes

Circle

Radius = n
Diameter 163379876
Circumference 513273018.18601
Area 2.0964620516344E+16

Sphere

Radius = n
Volume 2.2834647335649E+24
Surface area 8.3858482065376E+16
Circumference 513273018.18601

Square

Length = n
Perimeter 326759752
Area 6673245970443844
Diagonal 115527018.22902

Cube

Length = n
Surface area 40039475822663064
Volume 5.4513704958431E+23
Space diagonal 141491123.08315

Equilateral Triangle

Length = n
Perimeter 245069814
Area 2.8896002680533E+15
Altitude 70745561.541576

Triangular Pyramid

Length = n
Surface area 2.8896002680533E+15
Volume 6.4245017406182E+22
Height 38509006.076339