81444638 (number)

81444638 is an even 8-digits composite number following 81444637 and preceding 81444639. In scientific notation, it is written as 8.1444638 × 10^7. The sum of its digits is 38. It has a total of 4 prime factors and 16 positive divisors. There are 36412800 positive integers (up to 81444638) that are relatively prime to 81444638.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1444638 × 10^7
Engineering notation 8.1444638 × 10^6

Prime Factorization of 81444638

Prime Factorization 2 × 11 × 61 × 60689

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81444638
Product of the distinct prime numbers

The prime factorization of 81444638 is 2 × 11 × 61 × 60689. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 7, 60, 4, 603, 560, 7017, 1479, 92660, 70918, 771818, 104348, 3434916, 903335, 95683975, 63137364, 355391802, 537785867, 6364510228, 4188264233

Basic calculations (n = 81444638)

Multiplication

n×y
n×2 162889276
n×3 244333914
n×4 325778552
n×5 407223190

Division

n÷y
n÷2 40722319
n÷3 27148212.666667
n÷3 20361159.5
n÷5 16288927.6

Exponentiation

ny
n2 6633229058951044
n3 5.4024093947735E+23
n4 4.3999727748513E+31
n5 3.5835418985762E+39

Nth Root

y√n
2√n 9024.6683041539
3√n 433.46512927319
4√n 94.998254216348
5√n 38.20960072098

Divisors of 81444638

1, 2, 11, 22, 61, 122, 671, 1342, 60689, 121378, 667579, 1335158, 3702029, 7404058, 40722319, 81444638

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 -81444637
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 81444638 can be divided by 16 positive divisors. The sum of these divisors (counting 81444638) is 1, the average is 0.0625.

Base conversion 81444638

Base System Value
2 Binary 100110110101011111100011110
3 Ternary 12200020211001002
4 Quaternary 10312223330132
5 Quinary 131322212023
6 Senary 12025350302
8 Octal 466537436
10 Decimal 81444638
12 Duodecimal 23338392
16 Hexadecimal 4dabf1e
20 Vigesimal 1590bbi
36 Base36 1chn32

Cryptographic Hash Functions

md5 9d69697061fb7cbd78447ab8531cb972
sha1 f1b058b8f40f2ac684061130d8077e4e1eb7979e
sha256 2f2ad730003d6d87336687d36901050ea2ce93fb145757605ee3d960bb465536
sha512 c02ecf9311a1bbdf1105c41867746296f7cec174877357698fe41576c928dc995db4964798db0a8d7e2fc37856fed8273c7a06c6eaa670a45dce18ab47ddfae5
ripemd-160 9d4cf5c40e6a1e5490df3938c7e50b6590116f7b

81444638 as geometric shapes

Circle

Radius = n
Diameter 162889276
Circumference 511731752.83016
Area 2.0838903681179E+16

Sphere

Radius = n
Volume 2.2629559555073E+24
Surface area 8.3355614724716E+16
Circumference 511731752.83016

Square

Length = n
Perimeter 325778552
Area 6633229058951044
Diagonal 115180111.64217

Cube

Length = n
Surface area 39799374353706264
Volume 5.4024093947735E+23
Space diagonal 141066251.02005

Equilateral Triangle

Length = n
Perimeter 244333914
Area 2.8722724370864E+15
Altitude 70533125.510027

Triangular Pyramid

Length = n
Surface area 2.8722724370864E+15
Volume 6.3668005296504E+22
Height 38393370.547389