81686870 (number)

81686870 is an even 8-digits composite number following 81686869 and preceding 81686871. In scientific notation, it is written as 8.1686870 × 10^7. The sum of its digits is 44. It has a total of 4 prime factors and 16 positive divisors. There are 30401536 positive integers (up to 81686870) that are relatively prime to 81686870.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1686870 × 10^7
Engineering notation 8.1686870 × 10^6

Prime Factorization of 81686870

Prime Factorization 2 × 85 × 89 × 5399

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81686870
Product of the distinct prime numbers

The prime factorization of 81686870 is 2 × 85 × 89 × 5399. Since it has a total of 4 prime factors.

Most popular turbo-numbers

3, 7, 9, 30, 696, 995, 1621, 7612, 15595, 17562, 748548, 63801, 7218695, 5646433, 9198771, 88895306, 563320138, 778983006, 3974064052, 563573750

Basic calculations (n = 81686870)

Multiplication

n×y
n×2 163373740
n×3 245060610
n×4 326747480
n×5 408434350

Division

n÷y
n÷2 40843435
n÷3 27228956.666667
n÷3 20421717.5
n÷5 16337374

Exponentiation

ny
n2 6672744730396900
n3 5.4507563133512E+23
n4 4.452552223704E+31
n5 3.6371505466592E+39

Nth Root

y√n
2√n 9038.0788887905
3√n 433.89444012603
4√n 95.06881133574
5√n 38.232302268138

Divisors of 81686870

1, 2, 85, 89, 170, 178, 5399, 7565, 10798, 15130, 458915, 480511, 917830, 961022, 40843435, 81686870

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 -81686869
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 81686870 can be divided by 16 positive divisors. The sum of these divisors (counting 81686870) is 1, the average is 0.0625.

Base conversion 81686870

Base System Value
2 Binary 100110111100111000101010110
3 Ternary 12200201010022122
4 Quaternary 10313213011112
5 Quinary 131402434440
6 Senary 12034455542
8 Octal 467470526
10 Decimal 81686870
12 Duodecimal 234345b2
16 Hexadecimal 4de7156
20 Vigesimal 15aah3a
36 Base36 1cmtzq

Cryptographic Hash Functions

md5 a941f2695d359fc21e814d73e4d2ad79
sha1 54498a2775d29590884a4fd20a6e135654be3854
sha256 d1382f084937e95799928ea1f2b80df8336c76591c827c9fb227df65582692c5
sha512 78e72e59559098cba7c80aa5646a8e9891250aec5a0ba18f965172235b4823c1a269445613a9cc99d47ac7dc5f4f98889e52c6a1a3d82e26e241f5220c0b5bcd
ripemd-160 e698147d68751029c2ebec9a0fa6700f81ba04b4

81686870 as geometric shapes

Circle

Radius = n
Diameter 163373740
Circumference 513253741.37349
Area 2.0963045824295E+16

Sphere

Radius = n
Volume 2.2832074654043E+24
Surface area 8.385218329718E+16
Circumference 513253741.37349

Square

Length = n
Perimeter 326747480
Area 6672744730396900
Diagonal 115522679.42181

Cube

Length = n
Surface area 40036468382381400
Volume 5.4507563133512E+23
Space diagonal 141485809.15127

Equilateral Triangle

Length = n
Perimeter 245060610
Area 2.8893832247462E+15
Altitude 70742904.575637

Triangular Pyramid

Length = n
Surface area 2.8893832247462E+15
Volume 6.42377791961E+22
Height 38507559.807269