18981388 (number)

18981388 is an even 8-digits composite number following 18981387 and preceding 18981389. In scientific notation, it is written as 1.8981388 × 10^7. The sum of its digits is 46. It has a total of 4 prime factors and 12 positive divisors. There are 9474080 positive integers (up to 18981388) that are relatively prime to 18981388.

Interesting facts

Basic properties

Name

Name eighteen million nine hundred eighty-one thousand three hundred eighty-eight

Notation

Scientific notation 1.8981388 × 10^7
Engineering notation 1.8981388 × 10^6

Prime Factorization of 18981388

Prime Factorization 2 × 2 × 617 × 7691

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 9490694
Product of the distinct prime numbers

The prime factorization of 18981388 is 2 × 2 × 617 × 7691. Since it has a total of 4 prime factors.

Most popular turbo-numbers

4, 6, 66, 62, 137, 178, 277, 3993, 35361, 46408, 777216, 525435, 1114197, 3878793, 59243399, 51697783, 533502086, 313155300, 5088100444, 1737467136

Basic calculations (n = 18981388)

Multiplication

n×y
n×2 37962776
n×3 56944164
n×4 75925552
n×5 94906940

Division

n÷y
n÷2 9490694
n÷3 6327129.3333333
n÷3 4745347
n÷5 3796277.6

Exponentiation

ny
n2 360293090406544
n3 6.8388629427257E+21
n4 1.298111109947E+29
n5 2.4639950645014E+36

Nth Root

y√n
2√n 4356.7634776288
3√n 266.75300607041
4√n 66.005783668015
5√n 28.553910461919

Divisors of 18981388

1, 2, 4, 617, 1234, 2468, 7691, 15382, 30764, 4745347, 9490694, 18981388

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 -18981387
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 18981388 can be divided by 12 positive divisors. The sum of these divisors (counting 18981388) is 1, the average is 0.083333333333333.

Base conversion 18981388

Base System Value
2 Binary 1001000011010001000001100
3 Ternary 1022201100120101
4 Quaternary 1020122020030
5 Quinary 14324401023
6 Senary 1514500444
8 Octal 110321014
10 Decimal 18981388
12 Duodecimal 6434724
16 Hexadecimal 121a20c
20 Vigesimal 5icd98
36 Base36 bau4s

Cryptographic Hash Functions

md5 8f82bbf787029363d3abab4bd0f3cbf8
sha1 034d0717102c0ecdcedba6db8545f29e9d58d967
sha256 8f89d645ef54653d9995248e55f45aada3efb46301e680b4b6fbb3aad1f3379e
sha512 da76588a0ce94764910a90c65578423898218b4e147a3e46c351afef3b4896b13937460c535196fbc6421a54962869bdcc07d599b0677e04d427aba3c6303e8d
ripemd-160 50d2c1897ba4d6ad51b501685f1c288bb0d3a917

18981388 as geometric shapes

Circle

Radius = n
Diameter 37962776
Circumference 119263578.19147
Area 1.1318941259604E+15

Sphere

Radius = n
Volume 2.8646562106366E+22
Surface area 4.5275765038414E+15
Circumference 119263578.19147

Square

Length = n
Perimeter 75925552
Area 360293090406544
Diagonal 26843736.342266

Cube

Length = n
Surface area 2161758542439264
Volume 6.8388629427257E+21
Space diagonal 32876728.414178

Equilateral Triangle

Length = n
Perimeter 56944164
Area 1.5601148455004E+14
Altitude 16438364.207089

Triangular Pyramid

Length = n
Surface area 1.5601148455004E+14
Volume 8.0596772706779E+20
Height 8947912.1140886