638540821 (number)

638540821 is an odd 9-digits composite number following 638540820 and preceding 638540822. In scientific notation, it is written as 6.38540821 × 10^8. The sum of its digits is 37. It has a total of 4 prime factors and 16 positive divisors. There are 595203840 positive integers (up to 638540821) that are relatively prime to 638540821.

Interesting facts

Basic properties

Name

Name six hundred thirty-eight million five hundred forty thousand eight hundred twenty-one

Notation

Scientific notation 6.38540821 × 10^8
Engineering notation 6.38540821 × 10^6

Prime Factorization of 638540821

Prime Factorization 31 × 977 × 29 × 727

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 638540821
Product of the distinct prime numbers

The prime factorization of 638540821 is 31 × 977 × 29 × 727. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 3, 55, 86, 149, 898, 9898, 868, 910, 18547, 696746, 958400, 1376089, 6477560, 42867550, 95678717, 741289977, 803803738, 7405511331, 9666605708

Basic calculations (n = 638540821)

Multiplication

n×y
n×2 1277081642
n×3 1915622463
n×4 2554163284
n×5 3192704105

Division

n÷y
n÷2 319270410.5
n÷3 212846940.33333
n÷3 159635205.25
n÷5 127708164.2

Exponentiation

ny
n2 407734380083354041
n3 2.6035504580835E+26
n4 1.6624732470196E+35
n5 1.0615570320424E+44

Nth Root

y√n
2√n 25269.365267058
3√n 861.11843891494
4√n 158.96340857901
5√n 57.681657737383

Divisors of 638540821

1, 29, 31, 727, 899, 977, 21083, 22537, 28333, 30287, 653573, 710279, 878323, 20598091, 22018649, 638540821

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 -638540820
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 638540821 can be divided by 16 positive divisors. The sum of these divisors (counting 638540821) is 1, the average is 0.0625.

Base conversion 638540821

Base System Value
2 Binary 100110000011110101110000010101
3 Ternary 1122111112020100001
4 Quaternary 212003311300111
5 Quinary 2301431301241
6 Senary 143210051301
8 Octal 4603656025
10 Decimal 638540821
12 Duodecimal 159a19b31
16 Hexadecimal 260f5c15
20 Vigesimal 9jahc11
36 Base36 ak6591

Cryptographic Hash Functions

md5 0838446eff7e1d19e8049ac3833189dc
sha1 e765390c2cbfa899f243629abeacee52002cf715
sha256 176f0d2140bc430cb1fb1dfbf39e9b4bf5839816a23e9ac4c67268f0d1b014c0
sha512 98483f3d009d6dee86aecb9d8fb808576f40d3beab3709d4d0feb33058731dfe5ea5e354e1f21e5fc53cf7760bb0ab06ddee2aac81b4a8258b7c5dd9e69aab63
ripemd-160 f250b765f64db46b6dbb1a8bc3e79387c3a4b165

638540821 as geometric shapes

Circle

Radius = n
Diameter 1277081642
Circumference 4012070304.5416
Area 1.2809353330859E+18

Sphere

Radius = n
Volume 1.0905726656487E+27
Surface area 5.1237413323434E+18
Circumference 4012070304.5416

Square

Length = n
Perimeter 2554163284
Area 407734380083354041
Diagonal 903033089.18705

Cube

Length = n
Surface area 2446406280500124246
Volume 2.6035504580835E+26
Space diagonal 1105985144.6787

Equilateral Triangle

Length = n
Perimeter 1915622463
Area 1.7655416557424E+17
Altitude 552992572.33937

Triangular Pyramid

Length = n
Surface area 1.7655416557424E+17
Volume 3.0683136401203E+25
Height 301011029.72902