81487816 (number)

81487816 is an even 8-digits composite number following 81487815 and preceding 81487817. In scientific notation, it is written as 8.1487816 × 10^7. The sum of its digits is 43. It has a total of 4 prime factors and 8 positive divisors. There are 40743904 positive integers (up to 81487816) that are relatively prime to 81487816.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred eighty-seven thousand eight hundred sixteen

Notation

Scientific notation 8.1487816 × 10^7
Engineering notation 8.1487816 × 10^6

Prime Factorization of 81487816

Prime Factorization 2 × 2 × 2 × 10185977

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 20371954
Product of the distinct prime numbers

The prime factorization of 81487816 is 2 × 2 × 2 × 10185977. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 2, 60, 37, 849, 992, 6501, 3763, 11289, 75429, 24737, 841688, 3090731, 1906555, 79511942, 67860491, 609680242, 399966758, 9340537785, 5257168148

Basic calculations (n = 81487816)

Multiplication

n×y
n×2 162975632
n×3 244463448
n×4 325951264
n×5 407439080

Division

n÷y
n÷2 40743908
n÷3 27162605.333333
n÷3 20371954
n÷5 16297563.2

Exponentiation

ny
n2 6640264156449856
n3 5.4110062377218E+23
n4 4.4093108067433E+31
n5 3.5930510770671E+39

Nth Root

y√n
2√n 9027.0602080633
3√n 433.54171647532
4√n 95.010842581588
5√n 38.213651237824

Divisors of 81487816

1, 2, 4, 8, 10185977, 20371954, 40743908, 81487816

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 -81487815
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 81487816 can be divided by 8 positive divisors. The sum of these divisors (counting 81487816) is 1, the average is 0.125.

Base conversion 81487816

Base System Value
2 Binary 100110110110110011111001000
3 Ternary 12200100000021021
4 Quaternary 10312312133020
5 Quinary 131330102231
6 Senary 12030322224
8 Octal 466663710
10 Decimal 81487816
12 Duodecimal 23359374
16 Hexadecimal 4db67c8
20 Vigesimal 1595jag
36 Base36 1cikeg

Cryptographic Hash Functions

md5 29fc337a685f1ca295b498e7614b0199
sha1 77f6a9aaea94f6c83d4a618b711705b385345a86
sha256 379fccb8183d8841fd4ec3aee11b8a4ec41b842225745bc5e5f6cb6f3e0b9c65
sha512 b8c700652b2a55d714215c577f6effe1dda452af9706f06903156c7dd09e0c8710efa96fb7ace978ea11eaeb2107d5ef53a4ea976636a354046827ca4b0732a9
ripemd-160 48bcdcefb45d5ac48c7885d0d9882acec9c3a66f

81487816 as geometric shapes

Circle

Radius = n
Diameter 162975632
Circumference 512003048.20535
Area 2.0861005091798E+16

Sphere

Radius = n
Volume 2.2665569926607E+24
Surface area 8.3444020367194E+16
Circumference 512003048.20535

Square

Length = n
Perimeter 325951264
Area 6640264156449856
Diagonal 115241174.55536

Cube

Length = n
Surface area 39841584938699136
Volume 5.4110062377218E+23
Space diagonal 141141037.50982

Equilateral Triangle

Length = n
Perimeter 244463448
Area 2.8753187236624E+15
Altitude 70570518.754912

Triangular Pyramid

Length = n
Surface area 2.8753187236624E+15
Volume 6.3769320062263E+22
Height 38413724.851788