81978980 (number)

81978980 is an even 8-digits composite number following 81978979 and preceding 81978981. In scientific notation, it is written as 8.1978980 × 10^7. The sum of its digits is 50. It has a total of 4 prime factors and 12 positive divisors. There are 32791584 positive integers (up to 81978980) that are relatively prime to 81978980.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1978980 × 10^7
Engineering notation 8.1978980 × 10^6

Prime Factorization of 81978980

Prime Factorization 2 × 2 × 5 × 4098949

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40989490
Product of the distinct prime numbers

The prime factorization of 81978980 is 2 × 2 × 5 × 4098949. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 5, 36, 16, 667, 463, 7280, 5841, 25031, 8545, 361556, 61452, 7449862, 503742, 46778889, 8469016, 978763441, 204411514, 164954871, 4702678740

Basic calculations (n = 81978980)

Multiplication

n×y
n×2 163957960
n×3 245936940
n×4 327915920
n×5 409894900

Division

n÷y
n÷2 40989490
n÷3 27326326.666667
n÷3 20494745
n÷5 16395796

Exponentiation

ny
n2 6720553161840400
n3 5.5094409324345E+23
n4 4.5165834801123E+31
n5 3.7026490678446E+39

Nth Root

y√n
2√n 9054.2244284091
3√n 434.41102304635
4√n 95.153688464552
5√n 38.259606772195

Divisors of 81978980

1, 2, 4, 5, 10, 20, 4098949, 8197898, 16395796, 20494745, 40989490, 81978980

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 -81978979
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 81978980 can be divided by 12 positive divisors. The sum of these divisors (counting 81978980) is 1, the average is 0.083333333333333.

Base conversion 81978980

Base System Value
2 Binary 100111000101110011001100100
3 Ternary 12201020222000112
4 Quaternary 10320232121210
5 Quinary 131441311410
6 Senary 12045032152
8 Octal 470563144
10 Decimal 81978980
12 Duodecimal 23555658
16 Hexadecimal 4e2e664
20 Vigesimal 15c7790
36 Base36 1ct3dw

Cryptographic Hash Functions

md5 080e3f6d78d21f86550afe538bcece2b
sha1 898e5282453b44ad95f306bfe32e0a4a02af84eb
sha256 2ce92c78c60c7b8625324503976c4faae5137cbf7f5b0b59e02fbc4459cf0174
sha512 852b51666c9fd657165ab99854f20a2381ae2d10f5c52ec6e63509bd6d584eee2c70a1090157cc218f32def7639fd11c9ca11fd92014a2508e83c833b14f9a46
ripemd-160 a14a8af21cde4ee1103a0e7419da075f6e7fb4b3

81978980 as geometric shapes

Circle

Radius = n
Diameter 163957960
Circumference 515089122.63357
Area 2.1113240441297E+16

Sphere

Radius = n
Volume 2.3077892211631E+24
Surface area 8.445296176519E+16
Circumference 515089122.63357

Square

Length = n
Perimeter 327915920
Area 6720553161840400
Diagonal 115935785.34551

Cube

Length = n
Surface area 40323318971042400
Volume 5.5094409324345E+23
Space diagonal 141991758.51267

Equilateral Triangle

Length = n
Perimeter 245936940
Area 2.9100848828188E+15
Altitude 70995879.256336

Triangular Pyramid

Length = n
Surface area 2.9100848828188E+15
Volume 6.492938406452E+22
Height 38645261.781838