638406921 (number)

638406921 is an odd 9-digits composite number following 638406920 and preceding 638406922. In scientific notation, it is written as 6.38406921 × 10^8. The sum of its digits is 39. It has a total of 2 prime factors and 4 positive divisors. There are 425604612 positive integers (up to 638406921) that are relatively prime to 638406921.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 6.38406921 × 10^8
Engineering notation 6.38406921 × 10^6

Prime Factorization of 638406921

Prime Factorization 3 × 212802307

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 638406921
Product of the distinct prime numbers

The prime factorization of 638406921 is 3 × 212802307. Since it has a total of 2 prime factors.

Most popular turbo-numbers

7, 5, 73, 92, 214, 763, 3075, 1287, 3905, 78860, 940108, 732854, 9794648, 221599, 67701074, 11650892, 414314677, 918201377, 7532385934, 6112430344

Basic calculations (n = 638406921)

Multiplication

n×y
n×2 1276813842
n×3 1915220763
n×4 2553627684
n×5 3192034605

Division

n÷y
n÷2 319203460.5
n÷3 212802307
n÷3 159601730.25
n÷5 127681384.2

Exponentiation

ny
n2 407563396780700241
n3 2.6019129325107E+26
n4 1.6610792239542E+35
n5 1.0604444729017E+44

Nth Root

y√n
2√n 25266.715674974
3√n 861.05824343188
4√n 158.95507439203
5√n 57.679238402035

Divisors of 638406921

1, 3, 212802307, 638406921

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 -638406920
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 638406921 can be divided by 4 positive divisors. The sum of these divisors (counting 638406921) is 1, the average is 0.25.

Base conversion 638406921

Base System Value
2 Binary 100110000011010101000100001001
3 Ternary 1122111021102122210
4 Quaternary 212003111010021
5 Quinary 2301413010141
6 Senary 143203135333
8 Octal 4603250411
10 Decimal 638406921
12 Duodecimal 159974549
16 Hexadecimal 260d5109
20 Vigesimal 9ja0h61
36 Base36 ak39xl

Cryptographic Hash Functions

md5 8dc25e8ea05943c7a2019913c6129013
sha1 c2a0311b4f52f12f14b386c5c5ebfaab44f12a29
sha256 e4c11492aca68974b6a5b388a277aadadc993ed8cacfe6c5280959769823bb35
sha512 0a19b43bcabb1a9366f0416d675b1d5f4de1ef4ce6099e3f0e011ba0fdf1abb6c41380699fd3264e9cd5b630c30d1a16566d8139435053e8d50e88150b1ae374
ripemd-160 9c0d2f5ee5fd96b062fccaec0fe9bcd0a058ff5b

638406921 as geometric shapes

Circle

Radius = n
Diameter 1276813842
Circumference 4011228986.029
Area 1.2803981731983E+18

Sphere

Radius = n
Volume 1.0898867405408E+27
Surface area 5.1215926927934E+18
Circumference 4011228986.029

Square

Length = n
Perimeter 2553627684
Area 407563396780700241
Diagonal 902843725.99105

Cube

Length = n
Surface area 2445380380684201446
Volume 2.6019129325107E+26
Space diagonal 1105753223.0756

Equilateral Triangle

Length = n
Perimeter 1915220763
Area 1.7648012763238E+17
Altitude 552876611.53781

Triangular Pyramid

Length = n
Surface area 1.7648012763238E+17
Volume 3.0663837977255E+25
Height 300947908.66368