31387987 (number)

31387987 is an odd 8-digits composite number following 31387986 and preceding 31387988. In scientific notation, it is written as 3.1387987 × 10^7. The sum of its digits is 46. It has a total of 2 prime factors and 4 positive divisors. There are 31285440 positive integers (up to 31387987) that are relatively prime to 31387987.

Interesting facts

Basic properties

Name

Name thirty-one million three hundred eighty-seven thousand nine hundred eighty-seven

Notation

Scientific notation 3.1387987 × 10^7
Engineering notation 3.1387987 × 10^6

Prime Factorization of 31387987

Prime Factorization 307 × 102241

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 31387987
Product of the distinct prime numbers

The prime factorization of 31387987 is 307 × 102241. Since it has a total of 2 prime factors.

Most popular turbo-numbers

8, 7, 66, 3, 729, 239, 3845, 6026, 29481, 99945, 786219, 961362, 3872568, 5309496, 50431834, 83774248, 835094987, 438273987, 7060621621, 1804025114

Basic calculations (n = 31387987)

Multiplication

n×y
n×2 62775974
n×3 94163961
n×4 125551948
n×5 156939935

Division

n÷y
n÷2 15693993.5
n÷3 10462662.333333
n÷3 7846996.75
n÷5 6277597.4

Exponentiation

ny
n2 985205727912169
n3 3.0923624580033E+22
n4 9.7063032631095E+29
n5 3.0466132064054E+37

Nth Root

y√n
2√n 5602.4982820167
3√n 315.4431890462
4√n 74.84983822305
5√n 31.575678597462

Divisors of 31387987

1, 307, 102241, 31387987

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -31387986
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 31387987 can be divided by 4 positive divisors. The sum of these divisors (counting 31387987) is 1, the average is 0.25.

Base conversion 31387987

Base System Value
2 Binary 1110111101111000101010011
3 Ternary 2012001200020001
4 Quaternary 1313233011103
5 Quinary 31013403422
6 Senary 3040430431
8 Octal 167570523
10 Decimal 31387987
12 Duodecimal a618417
16 Hexadecimal 1def153
20 Vigesimal 9g39j7
36 Base36 ior4j

Cryptographic Hash Functions

md5 569bcfb1896fbd118d7153774371de6f
sha1 1c75372a4281978911d58399058c8c515eb07411
sha256 467c335a90aa3e47929c105c1ff1d947348f800fed19f62f10878f241a3cdde4
sha512 d89424d92fabe686ec2b77febcd695d1c168373342312fd42b2661620c00b623f9d81d1677ea59b427d961660ffce7790c1e1aa69c6172c7c0a4155f16c3d418
ripemd-160 7df667c54ea8b2d867557c0ab6cb6073b27f889e

31387987 as geometric shapes

Circle

Radius = n
Diameter 62775974
Circumference 197216538.74034
Area 3.0951150770835E+15

Sphere

Radius = n
Volume 1.2953257573733E+23
Surface area 1.2380460308334E+16
Circumference 197216538.74034

Square

Length = n
Perimeter 125551948
Area 985205727912169
Diagonal 44389316.91099

Cube

Length = n
Surface area 5911234367473014
Volume 3.0923624580033E+22
Space diagonal 54365588.231311

Equilateral Triangle

Length = n
Perimeter 94163961
Area 4.2660659416294E+14
Altitude 27182794.115656

Triangular Pyramid

Length = n
Surface area 4.2660659416294E+14
Volume 3.644384106568E+21
Height 14796438.97033