17991981 (number)

17991981 is an odd 8-digits composite number following 17991980 and preceding 17991982. In scientific notation, it is written as 1.7991981 × 10^7. The sum of its digits is 45. It has a total of 5 prime factors and 24 positive divisors. There are 10234080 positive integers (up to 17991981) that are relatively prime to 17991981.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 1.7991981 × 10^7
Engineering notation 1.7991981 × 10^6

Prime Factorization of 17991981

Prime Factorization 3 × 3 × 7 × 277 × 1031

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 5997327
Product of the distinct prime numbers

The prime factorization of 17991981 is 3 × 3 × 7 × 277 × 1031. Since it has a total of 5 prime factors.

Most popular turbo-numbers

10, 2, 97, 38, 762, 893, 9656, 3517, 76342, 53271, 216144, 90491, 1131053, 5261144, 41198912, 74526075, 361359042, 26532245, 8515950187, 4687339352

Basic calculations (n = 17991981)

Multiplication

n×y
n×2 35983962
n×3 53975943
n×4 71967924
n×5 89959905

Division

n÷y
n÷2 8995990.5
n÷3 5997327
n÷3 4497995.25
n÷5 3598396.2

Exponentiation

ny
n2 323711380304361
n3 5.8242090039198E+21
n4 1.0478905773855E+29
n5 1.88536273584E+36

Nth Root

y√n
2√n 4241.695533628
3√n 262.03521563043
4√n 65.128300558421
5√n 28.249827272308

Divisors of 17991981

1, 3, 7, 9, 21, 63, 277, 831, 1031, 1939, 2493, 3093, 5817, 7217, 9279, 17451, 21651, 64953, 285587, 856761, 1999109, 2570283, 5997327, 17991981

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -17991980
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 17991981 can be divided by 24 positive divisors. The sum of these divisors (counting 17991981) is 1, the average is 0.041666666666667.

Base conversion 17991981

Base System Value
2 Binary 1000100101000100100101101
3 Ternary 1020212002100200
4 Quaternary 1010220210231
5 Quinary 14101220411
6 Senary 1441344113
8 Octal 104504455
10 Decimal 17991981
12 Duodecimal 6038039
16 Hexadecimal 112892d
20 Vigesimal 5c8jj1
36 Base36 apmp9

Cryptographic Hash Functions

md5 d542847e96e403d901beca4c2bd1c7c9
sha1 36ac5f7d7beb5431920a2a7d90bb0066d7f5c9bc
sha256 812eb46f153b39d1082cc50f01273631a7f13b31c0aeedd733fc82146c5a8f4d
sha512 2b413b5ada5ce903d47856418d6c29d659124f66017bcf638f2767bef0296e00faf511802780760beeb04daff905ed01f8daaac9e818aaef5e207cc2ffb64285
ripemd-160 211ed75229b7d22d6f613dca78a4d1c60ac87f09

17991981 as geometric shapes

Circle

Radius = n
Diameter 35983962
Circumference 113046950.66625
Area 1.0169692942476E+15

Sphere

Radius = n
Volume 2.4396389626248E+22
Surface area 4.0678771769904E+15
Circumference 113046950.66625

Square

Length = n
Perimeter 71967924
Area 323711380304361
Diagonal 25444503.544159

Cube

Length = n
Surface area 1942268281826166
Volume 5.8242090039198E+21
Space diagonal 31163025.220814

Equilateral Triangle

Length = n
Perimeter 53975943
Area 1.4017113941885E+14
Altitude 15581512.610407

Triangular Pyramid

Length = n
Surface area 1.4017113941885E+14
Volume 6.8638961361991E+20
Height 8481501.1813863