81639785 (number)

81639785 is an odd 8-digits composite number following 81639784 and preceding 81639786. In scientific notation, it is written as 8.1639785 × 10^7. The sum of its digits is 47. It has a total of 4 prime factors and 16 positive divisors. There are 62252736 positive integers (up to 81639785) that are relatively prime to 81639785.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred thirty-nine thousand seven hundred eighty-five

Notation

Scientific notation 8.1639785 × 10^7
Engineering notation 8.1639785 × 10^6

Prime Factorization of 81639785

Prime Factorization 29 × 5 × 79 × 7127

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81639785
Product of the distinct prime numbers

The prime factorization of 81639785 is 29 × 5 × 79 × 7127. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 1, 16, 20, 353, 972, 9536, 4115, 9013, 79333, 62831, 448724, 2062709, 3722035, 96018033, 78322506, 429270229, 213333411, 588944227, 5775926400

Basic calculations (n = 81639785)

Multiplication

n×y
n×2 163279570
n×3 244919355
n×4 326559140
n×5 408198925

Division

n÷y
n÷2 40819892.5
n÷3 27213261.666667
n÷3 20409946.25
n÷5 16327957

Exponentiation

ny
n2 6665054494846225
n3 5.4413361597253E+23
n4 4.442295141927E+31
n5 3.6266802029346E+39

Nth Root

y√n
2√n 9035.4737009191
3√n 433.81105729965
4√n 95.055108757599
5√n 38.227893767363

Divisors of 81639785

1, 5, 29, 79, 145, 395, 2291, 7127, 11455, 35635, 206683, 563033, 1033415, 2815165, 16327957, 81639785

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 -81639784
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 81639785 can be divided by 16 positive divisors. The sum of these divisors (counting 81639785) is 1, the average is 0.0625.

Base conversion 81639785

Base System Value
2 Binary 100110111011011100101101001
3 Ternary 12200121201201202
4 Quaternary 10313123211221
5 Quinary 131344433120
6 Senary 12033453545
8 Octal 467334551
10 Decimal 81639785
12 Duodecimal 234112b5
16 Hexadecimal 4ddb969
20 Vigesimal 15a4j95
36 Base36 1cltnt

Cryptographic Hash Functions

md5 0cf0e5e2e1cd880cfea94bea3c2ab34d
sha1 0d35791349eec3d8c2761c58516e8fe06dc9da43
sha256 640792977db3c2bfbf5ec104fcd32546de04ff6fdb9b105df1ff365413d1862e
sha512 eef2c4402f42bda42a9366c9120c34dab364aa15a75833209ce099dd7173de2b959abe98059119ea60706defa963ebff6c20e40b8a8dd91e687dce1093a0dd80
ripemd-160 bc0f5198e35f43fcc97d22ddd04e28bb0456e55a

81639785 as geometric shapes

Circle

Radius = n
Diameter 163279570
Circumference 512957897.5933
Area 2.0938886236785E+16

Sphere

Radius = n
Volume 2.2792615606807E+24
Surface area 8.3755544947138E+16
Circumference 512957897.5933

Square

Length = n
Perimeter 326559140
Area 6665054494846225
Diagonal 115456091.17622

Cube

Length = n
Surface area 39990326969077350
Volume 5.4413361597253E+23
Space diagonal 141404255.539

Equilateral Triangle

Length = n
Perimeter 244919355
Area 2.8860532550722E+15
Altitude 70702127.7695

Triangular Pyramid

Length = n
Surface area 2.8860532550722E+15
Volume 6.4126761620955E+22
Height 38485363.725408