644920991 (number)

644920991 is an odd 9-digits composite number following 644920990 and preceding 644920992. In scientific notation, it is written as 6.44920991 × 10^8. The sum of its digits is 44. It has a total of 4 prime factors and 16 positive divisors. There are 531273600 positive integers (up to 644920991) that are relatively prime to 644920991.

Interesting facts

Basic properties

Name

Name six hundred forty-four million nine hundred twenty thousand nine hundred ninety-one

Notation

Scientific notation 6.44920991 × 10^8
Engineering notation 6.44920991 × 10^6

Prime Factorization of 644920991

Prime Factorization 13 × 2189 × 131 × 173

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 644920991
Product of the distinct prime numbers

The prime factorization of 644920991 is 13 × 2189 × 131 × 173. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 4, 87, 85, 152, 347, 3148, 3488, 16907, 74601, 928139, 381719, 6829481, 9297921, 13912044, 69720876, 549501300, 117114798, 8643538149, 1689331454

Basic calculations (n = 644920991)

Multiplication

n×y
n×2 1289841982
n×3 1934762973
n×4 2579683964
n×5 3224604955

Division

n÷y
n÷2 322460495.5
n÷3 214973663.66667
n÷3 161230247.75
n÷5 128984198.2

Exponentiation

ny
n2 415923084632422081
n3 2.6823752792092E+26
n4 1.7299201233015E+35
n5 1.1156618002704E+44

Nth Root

y√n
2√n 25395.294662594
3√n 863.97697939278
4√n 159.35901186502
5√n 57.796468461903

Divisors of 644920991

1, 13, 131, 173, 1703, 2189, 2249, 22663, 28457, 286759, 294619, 378697, 3727867, 4923061, 49609307, 644920991

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -644920990
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 644920991 can be divided by 16 positive divisors. The sum of these divisors (counting 644920991) is 1, the average is 0.0625.

Base conversion 644920991

Base System Value
2 Binary 100110011100001011011010011111
3 Ternary 1122221112101021122
4 Quaternary 212130023122133
5 Quinary 2310044432431
6 Senary 143554521155
8 Octal 4634133237
10 Decimal 644920991
12 Duodecimal 15bb961bb
16 Hexadecimal 2670b69f
20 Vigesimal a1af29b
36 Base36 anyw7z

Cryptographic Hash Functions

md5 0413c4d46f66ae9774ecd16c224a8986
sha1 ea5d9e9b6886a8c7289ea5feec53c50394eac3de
sha256 880ca1a8108692f7d84830e5abf48468cb4313e26edb76a6930d74fdd1c88b8d
sha512 ce750a325309fc739b3d9b1941dec4cf5e4d03ff5f992c1595a6f908ef2e3e20afadd416d0937b69da1737df71120ef5f00bc235f43425a0ed4272cb491d4c43
ripemd-160 6c711900a2f806914286fa59a12f5fd566b220a2

644920991 as geometric shapes

Circle

Radius = n
Diameter 1289841982
Circumference 4052158094.9429
Area 1.3066609071396E+18

Sphere

Radius = n
Volume 1.1235907295113E+27
Surface area 5.2266436285585E+18
Circumference 4052158094.9429

Square

Length = n
Perimeter 2579683964
Area 415923084632422081
Diagonal 912056012.1313

Cube

Length = n
Surface area 2495538507794532486
Volume 2.6823752792092E+26
Space diagonal 1117035923.2797

Equilateral Triangle

Length = n
Perimeter 1934762973
Area 1.8009997865603E+17
Altitude 558517961.63984

Triangular Pyramid

Length = n
Surface area 1.8009997865603E+17
Volume 3.1612095826933E+25
Height 304018670.71043