640918981 (number)

640918981 is an odd 9-digits composite number following 640918980 and preceding 640918982. In scientific notation, it is written as 6.40918981 × 10^8. The sum of its digits is 46. It has a total of 2 prime factors and 4 positive divisors. There are 639431500 positive integers (up to 640918981) that are relatively prime to 640918981.

Interesting facts

Basic properties

Name

Name six hundred forty million nine hundred eighteen thousand nine hundred eighty-one

Notation

Scientific notation 6.40918981 × 10^8
Engineering notation 6.40918981 × 10^6

Prime Factorization of 640918981

Prime Factorization 431 × 1487051

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 640918981
Product of the distinct prime numbers

The prime factorization of 640918981 is 431 × 1487051. Since it has a total of 2 prime factors.

Most popular turbo-numbers

1, 6, 87, 18, 923, 151, 5466, 5238, 73357, 8877, 585937, 224163, 5281184, 2878706, 24339452, 73173578, 723758268, 225762312, 4967289275, 4104328933

Basic calculations (n = 640918981)

Multiplication

n×y
n×2 1281837962
n×3 1922756943
n×4 2563675924
n×5 3204594905

Division

n÷y
n÷2 320459490.5
n÷3 213639660.33333
n÷3 160229745.25
n÷5 128183796.2

Exponentiation

ny
n2 410777140206078361
n3 2.6327486611897E+26
n4 1.6873785891588E+35
n5 1.0814729659249E+44

Nth Root

y√n
2√n 25316.377722731
3√n 862.18615469134
4√n 159.11121180712
5√n 57.724559398277

Divisors of 640918981

1, 431, 1487051, 640918981

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 -640918980
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 640918981 can be divided by 4 positive divisors. The sum of these divisors (counting 640918981) is 1, the average is 0.25.

Base conversion 640918981

Base System Value
2 Binary 100110001100111010010111000101
3 Ternary 1122200000001120001
4 Quaternary 212030322113011
5 Quinary 2303033401411
6 Senary 143333041301
8 Octal 4614722705
10 Decimal 640918981
12 Duodecimal 15a786231
16 Hexadecimal 2633a5c5
20 Vigesimal a05eh91
36 Base36 all491

Cryptographic Hash Functions

md5 ca7f63e88e6b0cc88a83e59da3c7a567
sha1 4eec7e947fb5824b757c88b87e628da4cddef36d
sha256 a4ba2d72a9672d871b15eab2ebf2f392170943de2ab8c25ee139eb3945802d4c
sha512 9cfd4699b29df839f5aeb8a7c9245305a6c274af6a3535d5c245bf024ed77a9128f0ed3190d19c071313b277cf0dfe0a6b095cd4e67da1fcffffd7523b837939
ripemd-160 fdbe67d5d15d78e7f97ea5d703db3835c23ef2b7

640918981 as geometric shapes

Circle

Radius = n
Diameter 1281837962
Circumference 4027012724.5117
Area 1.290494445934E+18

Sphere

Radius = n
Volume 1.1028031803656E+27
Surface area 5.1619777837362E+18
Circumference 4027012724.5117

Square

Length = n
Perimeter 2563675924
Area 410777140206078361
Diagonal 906396315.31254

Cube

Length = n
Surface area 2464662841236470166
Volume 2.6327486611897E+26
Space diagonal 1110104238.6273

Equilateral Triangle

Length = n
Perimeter 1922756943
Area 1.7787171935619E+17
Altitude 555052119.31364

Triangular Pyramid

Length = n
Surface area 1.7787171935619E+17
Volume 3.1027240524784E+25
Height 302132105.10418