81640385 (number)

81640385 is an odd 8-digits composite number following 81640384 and preceding 81640386. In scientific notation, it is written as 8.1640385 × 10^7. The sum of its digits is 35. It has a total of 2 prime factors and 4 positive divisors. There are 65312304 positive integers (up to 81640385) that are relatively prime to 81640385.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred forty thousand three hundred eighty-five

Notation

Scientific notation 8.1640385 × 10^7
Engineering notation 8.1640385 × 10^6

Prime Factorization of 81640385

Prime Factorization 5 × 16328077

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 81640385
Product of the distinct prime numbers

The prime factorization of 81640385 is 5 × 16328077. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 4, 6, 74, 28, 345, 3577, 3174, 47563, 82396, 126421, 445739, 1756898, 6005224, 49914037, 62575270, 956999369, 636325851, 2781196683, 2807980982

Basic calculations (n = 81640385)

Multiplication

n×y
n×2 163280770
n×3 244921155
n×4 326561540
n×5 408201925

Division

n÷y
n÷2 40820192.5
n÷3 27213461.666667
n÷3 20410096.25
n÷5 16328077

Exponentiation

ny
n2 6665152462948225
n3 5.4414561315879E+23
n4 4.4424257354345E+31
n5 3.6268134737478E+39

Nth Root

y√n
2√n 9035.5069033231
3√n 433.81212004129
4√n 95.055283405622
5√n 38.227949957292

Divisors of 81640385

1, 5, 16328077, 81640385

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81640384
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81640385 can be divided by 4 positive divisors. The sum of these divisors (counting 81640385) is 1, the average is 0.25.

Base conversion 81640385

Base System Value
2 Binary 100110111011011101111000001
3 Ternary 12200121202112222
4 Quaternary 10313123233001
5 Quinary 131344443020
6 Senary 12033500425
8 Octal 467335701
10 Decimal 81640385
12 Duodecimal 23411715
16 Hexadecimal 4ddbbc1
20 Vigesimal 15a50j5
36 Base36 1clu4h

Cryptographic Hash Functions

md5 72fa7d26b218cf789dd7ca3735c4b863
sha1 e3e41dec0621c8f204ce8d9b587e8400b0c40c90
sha256 2b55ecf3fddd419a25052ec3acd90c8e24d3f9f3bff4117a1d2116565d571f05
sha512 25c23932661fd64f738165f3f3d1513d84429ddf2ec21a2337a82184d645bb05fe1921c9f76f4605a1a9c07eaca4418c3c059dfc6cdef70aa3ebe62e8e62ac39
ripemd-160 4b7210194dafec89a58d3e2c62526e5dab03d283

81640385 as geometric shapes

Circle

Radius = n
Diameter 163280770
Circumference 512961667.50448
Area 2.0939194012654E+16

Sphere

Radius = n
Volume 2.279311814377E+24
Surface area 8.3756776050616E+16
Circumference 512961667.50448

Square

Length = n
Perimeter 326561540
Area 6665152462948225
Diagonal 115456939.70436

Cube

Length = n
Surface area 39990914777689350
Volume 5.4414561315879E+23
Space diagonal 141405294.76948

Equilateral Triangle

Length = n
Perimeter 244921155
Area 2.8860956765048E+15
Altitude 70702647.384742

Triangular Pyramid

Length = n
Surface area 2.8860956765048E+15
Volume 6.4128175502916E+22
Height 38485646.56812