638991621 is an odd 9-digits composite number following 638991620
and preceding 638991622 . In scientific notation, it is written as 6.38991621 × 10^8.
The sum of its digits is 45. It has a total of 4 prime factors and 12 positive divisors.
There are 425889576 positive integers (up to 638991621) that are relatively prime to 638991621.
638991621 has 12 divisors, whose sum is 923215072
The reverse of 638991621 is 126199836
Previous prime number is 6427
Is Prime? no Number parity odd Number length 9 Sum of Digits 45 Digital Root 9
Name
six hundred thirty-eight million nine hundred ninety-one thousand six hundred twenty-one
Scientific notation
6.38991621 × 10^8
Engineering notation
6.38991621 × 10^6
Prime Factorization
3 × 3 × 6427 × 11047
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
212997207 Product of the distinct prime numbers
The prime factorization of 638991621 is 3 × 3 × 6427 × 11047.
Since it has a total of 4 prime factors.
4 , 5 , 44 , 59 , 101 , 409 , 7549 , 289 , 58261 , 14011 , 462326 , 510461 , 803175 , 8141163 , 62480208 , 76212139 , 217680503 , 239963563 , 4260744818 , 9711914165
n×2
1277983242
n×3
1916974863
n×4
2555966484
n×5
3194958105
n÷2
319495810.5
n÷3
212997207
n÷3
159747905.25
n÷5
127798324.2
n2
408310291708207641
n3
2.6090685516961E+26
n4
1.6671729431484E+35
n5
1.0653095414297E+44
2 √n25278.283584927
3 √n861.32103670391
4 √n158.99145758476
5 √n57.689799911072
1 , 3 , 9 , 6427 , 11047 , 19281 , 33141 , 57843 , 99423 , 70999069 , 212997207 , 638991621
12 divisors
τ Total Divisors
12 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-638991620 Sum of the proper positive divisors of n
A Arithmetic Mean
0.083333333333333 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
12 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 638991621 can be divided by 12 positive divisors.
The sum of these divisors (counting 638991621) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
100110000101100011110100000101
3
Ternary
1122112101010201100
4
Quaternary
212011203310011
5
Quinary
2302040212441
6
Senary
143223450313
8
Octal
4605436405
10
Decimal
638991621
12
Duodecimal
159bb6999
16
Hexadecimal
26163d05
20
Vigesimal
9jddj11
36
Base36
akft39
md5
5fedef70c055885f32ffb7ad5c490b77
sha1
b4a9625485d2873e7277c5d0d1a82fb3661e4442
sha256
5432df62b8e28170f5a18fb52bf3405f5db1f542703cc063220277cfbcb43085
sha512
f4255e6140ae7c46af4f85d47f400450f8039fbd73c00243f51797b5f18b93156a76a94ecaf16b052079c2eb2b3a46c24de4a0832c26d1afdb4a530c3ddc7bba
ripemd-160
751709c0f4069c97ee56d7e068143641a4537dbd
Diameter
1277983242
Circumference
4014902764.4781
Area
1.2827446128156E+18
Volume
1.0928840792961E+27
Surface area
5.1309784512624E+18
Circumference
4014902764.4781
Perimeter
2555966484
Area
408310291708207641
Diagonal
903670616.66097
Surface area
2449861750249245846
Volume
2.6090685516961E+26
Space diagonal
1106765953.1828
Perimeter
1916974863
Area
1.7680354262297E+17
Altitude
553382976.5914
Surface area
1.7680354262297E+17
Volume
3.0748167758081E+25
Height
301223538.88699