638646921 (number)

638646921 is an odd 9-digits composite number following 638646920 and preceding 638646922. In scientific notation, it is written as 6.38646921 × 10^8. The sum of its digits is 45. It has a total of 5 prime factors and 24 positive divisors. There are 386195040 positive integers (up to 638646921) that are relatively prime to 638646921.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 6.38646921 × 10^8
Engineering notation 6.38646921 × 10^6

Prime Factorization of 638646921

Prime Factorization 3 × 3 × 11 × 463 × 13933

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 212882307
Product of the distinct prime numbers

The prime factorization of 638646921 is 3 × 3 × 11 × 463 × 13933. Since it has a total of 5 prime factors.

Most popular turbo-numbers

5, 4, 83, 12, 782, 534, 8015, 9528, 44587, 62213, 212637, 914674, 2872723, 8097112, 55461718, 1345202, 711258148, 212974750, 4568442742, 2958826300

Basic calculations (n = 638646921)

Multiplication

n×y
n×2 1277293842
n×3 1915940763
n×4 2554587684
n×5 3193234605

Division

n÷y
n÷2 319323460.5
n÷3 212882307
n÷3 159661730.25
n÷5 127729384.2

Exponentiation

ny
n2 407869889702780241
n3 2.6048484922729E+26
n4 1.6635784692616E+35
n5 1.0624392672358E+44

Nth Root

y√n
2√n 25271.464559855
3√n 861.16613077919
4√n 158.97001151115
5√n 57.683574487875

Divisors of 638646921

1, 3, 9, 11, 33, 99, 463, 1389, 4167, 5093, 13933, 15279, 41799, 45837, 125397, 153263, 459789, 1379367, 6450979, 19352937, 58058811, 70960769, 212882307, 638646921

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 -638646920
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 638646921 can be divided by 24 positive divisors. The sum of these divisors (counting 638646921) is 1, the average is 0.041666666666667.

Base conversion 638646921

Base System Value
2 Binary 100110000100001111101010001001
3 Ternary 1122111201121212200
4 Quaternary 212010033222021
5 Quinary 2301443200141
6 Senary 143212230413
8 Octal 4604175211
10 Decimal 638646921
12 Duodecimal 159a6b409
16 Hexadecimal 2610fa89
20 Vigesimal 9jbah61
36 Base36 ak8f49

Cryptographic Hash Functions

md5 474599dddbf7341b6020b725470604ce
sha1 bfb9b333f6dc51951b909d97c8da763a1c92fd9f
sha256 4c65c0a70bd0a50e974efd7d81d32fcce0b97b91159c847505574d4dc0fcd32a
sha512 cff2fbc55bde3c6f70ec9be045032555b9df9692fc53b234a2cd87f51cd1c12e872ff65081929f9df38278d070ee0987bc86b74d5dca98a99385e833bad73c28
ripemd-160 b1728ac6e54e7dd0ba01623b35fe0a229d1c00dd

638646921 as geometric shapes

Circle

Radius = n
Diameter 1277293842
Circumference 4012736950.5027
Area 1.2813610491107E+18

Sphere

Radius = n
Volume 1.0911163849385E+27
Surface area 5.1254441964429E+18
Circumference 4012736950.5027

Square

Length = n
Perimeter 2554587684
Area 407869889702780241
Diagonal 903183137.24602

Cube

Length = n
Surface area 2447219338216681446
Volume 2.6048484922729E+26
Space diagonal 1106168915.2694

Equilateral Triangle

Length = n
Perimeter 1915940763
Area 1.7661284296068E+17
Altitude 553084457.63471

Triangular Pyramid

Length = n
Surface area 1.7661284296068E+17
Volume 3.0698433880829E+25
Height 301061045.74867