81388586 (number)

81388586 is an even 8-digits composite number following 81388585 and preceding 81388587. In scientific notation, it is written as 8.1388586 × 10^7. The sum of its digits is 47. It has a total of 2 prime factors and 4 positive divisors. There are 40694292 positive integers (up to 81388586) that are relatively prime to 81388586.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred eighty-eight thousand five hundred eighty-six

Notation

Scientific notation 8.1388586 × 10^7
Engineering notation 8.1388586 × 10^6

Prime Factorization of 81388586

Prime Factorization 2 × 40694293

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 81388586
Product of the distinct prime numbers

The prime factorization of 81388586 is 2 × 40694293. Since it has a total of 2 prime factors.

Most popular turbo-numbers

8, 10, 13, 70, 426, 807, 8554, 496, 66417, 24752, 491567, 845356, 4148847, 2764693, 86308532, 50311079, 665679474, 183042816, 5072080529, 8000612488

Basic calculations (n = 81388586)

Multiplication

n×y
n×2 162777172
n×3 244165758
n×4 325554344
n×5 406942930

Division

n÷y
n÷2 40694293
n÷3 27129528.666667
n÷3 20347146.5
n÷5 16277717.2

Exponentiation

ny
n2 6624101931079396
n3 5.3912628969042E+23
n4 4.387872639333E+31
n5 3.571227496634E+39

Nth Root

y√n
2√n 9021.5622815563
3√n 433.36566635797
4√n 94.981905021727
5√n 38.204339934196

Divisors of 81388586

1, 2, 40694293, 81388586

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81388585
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81388586 can be divided by 4 positive divisors. The sum of these divisors (counting 81388586) is 1, the average is 0.25.

Base conversion 81388586

Base System Value
2 Binary 100110110011110010000101010
3 Ternary 12200010222011002
4 Quaternary 10312132100222
5 Quinary 131313413321
6 Senary 12024235002
8 Octal 466362052
10 Decimal 81388586
12 Duodecimal 2330ba62
16 Hexadecimal 4d9e42a
20 Vigesimal 158db96
36 Base36 1cgfu2

Cryptographic Hash Functions

md5 d7351a7d8821e4cd79f128e3cdcd82f9
sha1 313376a0a9f33a43f2a2de5d07d3d5070e807d02
sha256 2a90cb5e5bc306cc36d8bf9c255832a7bcf335f8683fd7ddb0d4923eba5577b5
sha512 394e672b17448efde736435f274061ed5a84c21428ce42cb6d61b9cf4892bfa98146b0fc16a81a487c17068291cd724140a7c83da747dbb95168add640ea12a9
ripemd-160 b3d2679bafda27c82b85811cb1e18111f9d2a72a

81388586 as geometric shapes

Circle

Radius = n
Diameter 162777172
Circumference 511379567.72732
Area 2.0810229963309E+16

Sphere

Radius = n
Volume 2.2582869213981E+24
Surface area 8.3240919853236E+16
Circumference 511379567.72732

Square

Length = n
Perimeter 325554344
Area 6624101931079396
Diagonal 115100842.14357

Cube

Length = n
Surface area 39744611586476376
Volume 5.3912628969042E+23
Space diagonal 140969166.10819

Equilateral Triangle

Length = n
Perimeter 244165758
Area 2.8683202747862E+15
Altitude 70484583.054095

Triangular Pyramid

Length = n
Surface area 2.8683202747862E+15
Volume 6.353664255934E+22
Height 38366947.38119