81090988 (number)

81090988 is an even 8-digits composite number following 81090987 and preceding 81090989. In scientific notation, it is written as 8.1090988 × 10^7. The sum of its digits is 43. It has a total of 4 prime factors and 12 positive divisors. There are 36859520 positive integers (up to 81090988) that are relatively prime to 81090988.

Interesting facts

Basic properties

Name

Name eighty-one million ninety thousand nine hundred eighty-eight

Notation

Scientific notation 8.1090988 × 10^7
Engineering notation 8.1090988 × 10^6

Prime Factorization of 81090988

Prime Factorization 2 × 2 × 11 × 1842977

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40545494
Product of the distinct prime numbers

The prime factorization of 81090988 is 2 × 2 × 11 × 1842977. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 4, 4, 25, 158, 767, 1298, 1014, 81712, 7359, 421467, 985481, 287009, 4488962, 36350097, 49098192, 980834816, 228763148, 4845724103, 2260986761

Basic calculations (n = 81090988)

Multiplication

n×y
n×2 162181976
n×3 243272964
n×4 324363952
n×5 405454940

Division

n÷y
n÷2 40545494
n÷3 27030329.333333
n÷3 20272747
n÷5 16218197.6

Exponentiation

ny
n2 6575748334816144
n3 5.332339293096E+23
n4 4.3240466162837E+31
n5 3.506412122725E+39

Nth Root

y√n
2√n 9005.0534701355
3√n 432.83681960858
4√n 94.89496019355
5√n 38.176360087366

Divisors of 81090988

1, 2, 4, 11, 22, 44, 1842977, 3685954, 7371908, 20272747, 40545494, 81090988

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81090987
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81090988 can be divided by 12 positive divisors. The sum of these divisors (counting 81090988) is 1, the average is 0.083333333333333.

Base conversion 81090988

Base System Value
2 Binary 100110101010101100110101100
3 Ternary 12122120211220221
4 Quaternary 10311111212230
5 Quinary 131224402423
6 Senary 12014021124
8 Octal 465254654
10 Decimal 81090988
12 Duodecimal 231a77a4
16 Hexadecimal 4d559ac
20 Vigesimal 156g798
36 Base36 1ca27g

Cryptographic Hash Functions

md5 f31c5bc6e722c9b13b0a9094f2c44c07
sha1 7825d41ef59ceb35cff172a444b81153c8317d29
sha256 559d3a47724a5cbe558a0c54563dfb347ab103577bb1479e68c4002223b3cd45
sha512 27e2285c572df45c2becdbcdec429b5cab571fc2bd998e4f2d35b50487312511804e3b7f523472901ccf351815fb854a5e4d5598e44ba2b00382d4ee1e65fcd2
ripemd-160 d49c4694bc14d568288c41020ee7d4b4f733906a

81090988 as geometric shapes

Circle

Radius = n
Diameter 162181976
Circumference 509509704.34628
Area 2.0658322660514E+16

Sphere

Radius = n
Volume 2.2336050599518E+24
Surface area 8.2633290642055E+16
Circumference 509509704.34628

Square

Length = n
Perimeter 324363952
Area 6575748334816144
Diagonal 114679975.01583

Cube

Length = n
Surface area 39454490008896864
Volume 5.332339293096E+23
Space diagonal 140453711.25196

Equilateral Triangle

Length = n
Perimeter 243272964
Area 2.847382553422E+15
Altitude 70226855.625979

Triangular Pyramid

Length = n
Surface area 2.847382553422E+15
Volume 6.2842221228927E+22
Height 38226658.338611