81489690 (number)

81489690 is an even 8-digits composite number following 81489689 and preceding 81489691. In scientific notation, it is written as 8.1489690 × 10^7. The sum of its digits is 45. It has a total of 5 prime factors and 32 positive divisors. There are 20785248 positive integers (up to 81489690) that are relatively prime to 81489690.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred eighty-nine thousand six hundred ninety

Notation

Scientific notation 8.1489690 × 10^7
Engineering notation 8.1489690 × 10^6

Prime Factorization of 81489690

Prime Factorization 2 × 5 × 9 × 23 × 39367

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81489690
Product of the distinct prime numbers

The prime factorization of 81489690 is 2 × 5 × 9 × 23 × 39367. Since it has a total of 5 prime factors.

Most popular turbo-numbers

4, 6, 3, 18, 512, 328, 5822, 591, 71369, 47515, 615611, 94849, 7704980, 4394736, 28911475, 26661877, 242878655, 981053305, 3673127966, 4048421245

Basic calculations (n = 81489690)

Multiplication

n×y
n×2 162979380
n×3 244469070
n×4 325958760
n×5 407448450

Division

n÷y
n÷2 40744845
n÷3 27163230
n÷3 20372422.5
n÷5 16297938

Exponentiation

ny
n2 6640569576296100
n3 5.411379561958E+23
n4 4.4097164297629E+31
n5 3.5934642484929E+39

Nth Root

y√n
2√n 9027.1640064862
3√n 433.54503987993
4√n 95.011388825162
5√n 38.213826998391

Divisors of 81489690

1, 2, 5, 9, 10, 18, 23, 45, 46, 90, 115, 207, 230, 414, 1035, 2070, 39367, 78734, 196835, 354303, 393670, 708606, 905441, 1771515, 1810882, 3543030, 4527205, 8148969, 9054410, 16297938, 40744845, 81489690

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 -81489689
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 81489690 can be divided by 32 positive divisors. The sum of these divisors (counting 81489690) is 1, the average is 0.03125.

Base conversion 81489690

Base System Value
2 Binary 100110110110110111100011010
3 Ternary 12200100002211200
4 Quaternary 10312312330122
5 Quinary 131330132230
6 Senary 12030335030
8 Octal 466667432
10 Decimal 81489690
12 Duodecimal 2335a476
16 Hexadecimal 4db6f1a
20 Vigesimal 159644a
36 Base36 1cilui

Cryptographic Hash Functions

md5 eef03e340ed3db4551fba2094b69ebf4
sha1 6c9584c91931ebd6c5c961440c7b6af2267a9ed2
sha256 a90d6113f5d1a2fa433aa93ea0ece1b39bfa19453ed52dacff7f6a6b4bcca46d
sha512 8cc6be07cd71c2c99291055154aa3de1d87cc26d22a2b3b72200985409e28eef1a8b5d7e8e7e8119379eb9ad9b63c56b127896dee0d712ccd0d2fdb14a4242f3
ripemd-160 88d544732201ec145201a3766cdbcadbb609c536

81489690 as geometric shapes

Circle

Radius = n
Diameter 162979380
Circumference 512014822.89462
Area 2.0861964596544E+16

Sphere

Radius = n
Volume 2.2667133703511E+24
Surface area 8.3447858386175E+16
Circumference 512014822.89462

Square

Length = n
Perimeter 325958760
Area 6640569576296100
Diagonal 115243824.79158

Cube

Length = n
Surface area 39843417457776600
Volume 5.411379561958E+23
Space diagonal 141144283.37304

Equilateral Triangle

Length = n
Perimeter 244469070
Area 2.8754509743352E+15
Altitude 70572141.686519

Triangular Pyramid

Length = n
Surface area 2.8754509743352E+15
Volume 6.377371973058E+22
Height 38414608.26386