81640188 (number)

81640188 is an even 8-digits composite number following 81640187 and preceding 81640189. In scientific notation, it is written as 8.1640188 × 10^7. The sum of its digits is 36. It has a total of 9 prime factors and 216 positive divisors. There are 20445696 positive integers (up to 81640188) that are relatively prime to 81640188.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred forty thousand one hundred eighty-eight

Notation

Scientific notation 8.1640188 × 10^7
Engineering notation 8.1640188 × 10^6

Prime Factorization of 81640188

Prime Factorization 2 × 2 × 7 × 3 × 3 × 17 × 17 × 19 × 59

Composite number
ω Distinct Factors 6
Total number of distinct prime factors
Ω Total Factors 9
Total number of prime factors
rad Radical 800394
Product of the distinct prime numbers

The prime factorization of 81640188 is 2 × 2 × 7 × 3 × 3 × 17 × 17 × 19 × 59. Since it has a total of 9 prime factors.

Most popular turbo-numbers

Basic calculations (n = 81640188)

Multiplication

n×y
n×2 163280376
n×3 244920564
n×4 326560752
n×5 408200940

Division

n÷y
n÷2 40820094
n÷3 27213396
n÷3 20410047
n÷5 16328037.6

Exponentiation

ny
n2 6665120296675344
n3 5.4414167406319E+23
n4 4.4423828569154E+31
n5 3.6267697160655E+39

Nth Root

y√n
2√n 9035.4960018806
3√n 433.81177110836
4√n 95.055226062961
5√n 38.227931508302

Divisors of 81640188

216 divisors

τ Total Divisors 216
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81640187
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0046296296296296
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 216
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81640188 can be divided by 216 positive divisors. The sum of these divisors (counting 81640188) is 1, the average is 0.0046296296296296.

Base conversion 81640188

Base System Value
2 Binary 100110111011011101011111100
3 Ternary 12200121202021200
4 Quaternary 10313123223330
5 Quinary 131344441223
6 Senary 12033455500
8 Octal 467335374
10 Decimal 81640188
12 Duodecimal 23411590
16 Hexadecimal 4ddbafc
20 Vigesimal 15a5098
36 Base36 1cltz0

Cryptographic Hash Functions

md5 b61a0302dbd2c34e4aeaa3b35e29667f
sha1 997862c5e6d040ea47bc4fc73320988bfb749f03
sha256 bfe6cd8cbccee382f981c8be2eef8feddea61aab1a607dd238b846e29b69d2c5
sha512 8388c0b1ed9afa4f3f37a4a71d715639ed3ae0dcf1bcb667f48ff26bf3279d826c51fa405715eb13d3798f9b8204ebfb14d822ed587a49cfcbe6444d76a3defb
ripemd-160 8df3da90c5b38bf26992a6dffbfe4502a8c4ae43

81640188 as geometric shapes

Circle

Radius = n
Diameter 163280376
Circumference 512960429.71698
Area 2.0939092959327E+16

Sphere

Radius = n
Volume 2.279295314332E+24
Surface area 8.375637183731E+16
Circumference 512960429.71698

Square

Length = n
Perimeter 326560752
Area 6665120296675344
Diagonal 115456661.10429

Cube

Length = n
Surface area 39990721780052064
Volume 5.4414167406319E+23
Space diagonal 141404953.55547

Equilateral Triangle

Length = n
Perimeter 244920564
Area 2.8860817481001E+15
Altitude 70702476.777737

Triangular Pyramid

Length = n
Surface area 2.8860817481001E+15
Volume 6.4127711276047E+22
Height 38485553.70143