81640688 (number)

81640688 is an even 8-digits composite number following 81640687 and preceding 81640689. In scientific notation, it is written as 8.1640688 × 10^7. The sum of its digits is 41. It has a total of 5 prime factors and 10 positive divisors. There are 40820336 positive integers (up to 81640688) that are relatively prime to 81640688.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1640688 × 10^7
Engineering notation 8.1640688 × 10^6

Prime Factorization of 81640688

Prime Factorization 2 × 2 × 2 × 2 × 5102543

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 10205086
Product of the distinct prime numbers

The prime factorization of 81640688 is 2 × 2 × 2 × 2 × 5102543. Since it has a total of 5 prime factors.

Most popular turbo-numbers

3, 5, 18, 21, 657, 214, 8665, 6925, 9243, 24259, 414770, 127975, 3456994, 244280, 14460087, 35153808, 324135003, 343075832, 6011335185, 9424868585

Basic calculations (n = 81640688)

Multiplication

n×y
n×2 163281376
n×3 244922064
n×4 326562752
n×5 408203440

Division

n÷y
n÷2 40820344
n÷3 27213562.666667
n÷3 20410172
n÷5 16328137.6

Exponentiation

ny
n2 6665201937113344
n3 5.4415167180487E+23
n4 4.4424916862499E+31
n5 3.6268807769973E+39

Nth Root

y√n
2√n 9035.5236704908
3√n 433.81265672384
4√n 95.055371602508
5√n 38.227978333081

Divisors of 81640688

1, 2, 4, 8, 16, 5102543, 10205086, 20410172, 40820344, 81640688

10 divisors

τ Total Divisors 10
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81640687
Sum of the proper positive divisors of n
A Arithmetic Mean 0.1
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 10
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81640688 can be divided by 10 positive divisors. The sum of these divisors (counting 81640688) is 1, the average is 0.1.

Base conversion 81640688

Base System Value
2 Binary 100110111011011110011110000
3 Ternary 12200121202222012
4 Quaternary 10313123303300
5 Quinary 131400000223
6 Senary 12033502052
8 Octal 467336360
10 Decimal 81640688
12 Duodecimal 23411928
16 Hexadecimal 4ddbcf0
20 Vigesimal 15a51e8
36 Base36 1clucw

Cryptographic Hash Functions

md5 0fc7dfb405d08b0ba2850868d413a27f
sha1 b67b222805e2b0a4f62d50d2536943d0182f184e
sha256 758418c6db64cf05689bfbc863237f09957aac35bdeceff1d2cd79ce6b6416b5
sha512 fdda5201d859403700675d33b25563dd15060e8e9edfa1c6d99119cfefd77e6af43c421bff27934a00ab02c2b77aa540b02e7b50ad860ef73488bd6ec12dc347
ripemd-160 303e4fc6e8fd87f5086ec833e56033caf8e2b708

81640688 as geometric shapes

Circle

Radius = n
Diameter 163281376
Circumference 512963571.30963
Area 2.0939349440328E+16

Sphere

Radius = n
Volume 2.2793371927744E+24
Surface area 8.3757397761311E+16
Circumference 512963571.30963

Square

Length = n
Perimeter 326562752
Area 6665201937113344
Diagonal 115457368.21107

Cube

Length = n
Surface area 39991211622680064
Volume 5.4415167180487E+23
Space diagonal 141405819.58088

Equilateral Triangle

Length = n
Perimeter 244922064
Area 2.8861170994467E+15
Altitude 70702909.790439

Triangular Pyramid

Length = n
Surface area 2.8861170994467E+15
Volume 6.4128889521203E+22
Height 38485789.40369