81887865 (number)

81887865 is an odd 8-digits composite number following 81887864 and preceding 81887866. In scientific notation, it is written as 8.1887865 × 10^7. The sum of its digits is 51. It has a total of 5 prime factors and 32 positive divisors. There are 41687040 positive integers (up to 81887865) that are relatively prime to 81887865.

Interesting facts

Basic properties

Name

Name eighty-one million eight hundred eighty-seven thousand eight hundred sixty-five

Notation

Scientific notation 8.1887865 × 10^7
Engineering notation 8.1887865 × 10^6

Prime Factorization of 81887865

Prime Factorization 3 × 5 × 41 × 47 × 2833

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81887865
Product of the distinct prime numbers

The prime factorization of 81887865 is 3 × 5 × 41 × 47 × 2833. Since it has a total of 5 prime factors.

Most popular turbo-numbers

9, 7, 30, 93, 464, 508, 2186, 9684, 48791, 7280, 570524, 922078, 5455396, 396479, 27555898, 37197380, 719028786, 800808540, 5527804022, 1148668827

Basic calculations (n = 81887865)

Multiplication

n×y
n×2 163775730
n×3 245663595
n×4 327551460
n×5 409439325

Division

n÷y
n÷2 40943932.5
n÷3 27295955
n÷3 20471966.25
n÷5 16377573

Exponentiation

ny
n2 6705622434258225
n3 5.4910910463751E+23
n4 4.4965372230827E+31
n5 3.6821183309127E+39

Nth Root

y√n
2√n 9049.1914003407
3√n 434.2500222891
4√n 95.127237951812
5√n 38.251098310849

Divisors of 81887865

1, 3, 5, 15, 41, 47, 123, 141, 205, 235, 615, 705, 1927, 2833, 5781, 8499, 9635, 14165, 28905, 42495, 116153, 133151, 348459, 399453, 580765, 665755, 1742295, 1997265, 5459191, 16377573, 27295955, 81887865

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81887864
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81887865 can be divided by 32 positive divisors. The sum of these divisors (counting 81887865) is 1, the average is 0.03125.

Base conversion 81887865

Base System Value
2 Binary 100111000011000001001111001
3 Ternary 12201002100000220
4 Quaternary 10320120021321
5 Quinary 131430402430
6 Senary 12043050253
8 Octal 470301171
10 Decimal 81887865
12 Duodecimal 23510989
16 Hexadecimal 4e18279
20 Vigesimal 15bfjd5
36 Base36 1cr52x

Cryptographic Hash Functions

md5 b4b0b9bb5f85c169f806e17bdbdec0f6
sha1 4c0b5150b2defb603cd3e0ee884e0dd9dcc566f0
sha256 fe05d4d855f763a82958d957284374f8258aed3d6dc131b12f10716ead82abfa
sha512 4e5d49e1896ce9a2ac9d04d3836a34833c092ed0358142744549a1c9a6b5abe121afc7a7c8c1aa72e6a1a2f5a07f97e2d679b56db52b9b392f97fa69baec426b
ripemd-160 6ecf4a8df158dc8daefead49a9626426db1aa212

81887865 as geometric shapes

Circle

Radius = n
Diameter 163775730
Circumference 514516630.20431
Area 2.1066334177213E+16

Sphere

Radius = n
Volume 2.3001028388646E+24
Surface area 8.426533670885E+16
Circumference 514516630.20431

Square

Length = n
Perimeter 327551460
Area 6705622434258225
Diagonal 115806929.27678

Cube

Length = n
Surface area 40233734605549350
Volume 5.4910910463751E+23
Space diagonal 141833942.70334

Equilateral Triangle

Length = n
Perimeter 245663595
Area 2.9036196881272E+15
Altitude 70916971.351671

Triangular Pyramid

Length = n
Surface area 2.9036196881272E+15
Volume 6.4713128583409E+22
Height 38602309.758926