81187946 (number)

81187946 is an even 8-digits composite number following 81187945 and preceding 81187947. In scientific notation, it is written as 8.1187946 × 10^7. The sum of its digits is 44. It has a total of 4 prime factors and 16 positive divisors. There are 33672240 positive integers (up to 81187946) that are relatively prime to 81187946.

Interesting facts

Basic properties

Name

Name eighty-one million one hundred eighty-seven thousand nine hundred forty-six

Notation

Scientific notation 8.1187946 × 10^7
Engineering notation 8.1187946 × 10^6

Prime Factorization of 81187946

Prime Factorization 2 × 7 × 31 × 187069

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81187946
Product of the distinct prime numbers

The prime factorization of 81187946 is 2 × 7 × 31 × 187069. Since it has a total of 4 prime factors.

Most popular turbo-numbers

9, 9, 8, 59, 385, 120, 3894, 7851, 1516, 92582, 985677, 733441, 1753553, 2680282, 86289526, 33811792, 228088569, 193310310, 2025106387, 2643648611

Basic calculations (n = 81187946)

Multiplication

n×y
n×2 162375892
n×3 243563838
n×4 324751784
n×5 405939730

Division

n÷y
n÷2 40593973
n÷3 27062648.666667
n÷3 20296986.5
n÷5 16237589.2

Exponentiation

ny
n2 6591482575698916
n3 5.3514893141578E+23
n4 4.3447642545742E+31
n5 3.527424856831E+39

Nth Root

y√n
2√n 9010.4353945855
3√n 433.00926078969
4√n 94.923313230131
5√n 38.185484984157

Divisors of 81187946

1, 2, 7, 14, 31, 62, 217, 434, 187069, 374138, 1309483, 2618966, 5799139, 11598278, 40593973, 81187946

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 -81187945
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 81187946 can be divided by 16 positive divisors. The sum of these divisors (counting 81187946) is 1, the average is 0.0625.

Base conversion 81187946

Base System Value
2 Binary 100110101101101010001101010
3 Ternary 12122202202220222
4 Quaternary 10311231101222
5 Quinary 131241003241
6 Senary 12020050042
8 Octal 465552152
10 Decimal 81187946
12 Duodecimal 23233922
16 Hexadecimal 4d6d46a
20 Vigesimal 15789h6
36 Base36 1cc50q

Cryptographic Hash Functions

md5 f28bb45a9076897cb71ce9386b54967a
sha1 a48c19bd1cd6e539bf7b782a39ab7a12f15c04a5
sha256 51b23b463e17934c3f033599c044ac5e8dbd8352e46191ecb27ef8f196e221d0
sha512 e2c77f30b69bb5af0f005c16ed00a7f3f3bbd8a0c7bb976ef3cd670674843666f6a7e97a58a7db33c757e76210be23d0ffe4b82e40177d31222aa4461e9df03d
ripemd-160 1433d40d88bd1603d0fe7840a148708fa5d5ffe9

81187946 as geometric shapes

Circle

Radius = n
Diameter 162375892
Circumference 510118909.42729
Area 2.0707753236081E+16

Sphere

Radius = n
Volume 2.2416266020163E+24
Surface area 8.2831012944323E+16
Circumference 510118909.42729

Square

Length = n
Perimeter 324751784
Area 6591482575698916
Diagonal 114817094.33441

Cube

Length = n
Surface area 39548895454193496
Volume 5.3514893141578E+23
Space diagonal 140621647.43416

Equilateral Triangle

Length = n
Perimeter 243563838
Area 2.8541956795789E+15
Altitude 70310823.717079

Triangular Pyramid

Length = n
Surface area 2.8541956795789E+15
Volume 6.3067906391473E+22
Height 38272364.778138