644634128 is an even 9-digits composite number following 644634127
and preceding 644634129. In scientific notation, it is written as 6.44634128 × 10^8.
The sum of its digits is 38. It has a total of 8 prime factors and 80 positive divisors.
There are 294617088 positive integers (up to 644634128) that are relatively prime to 644634128.
Prime Factorization
2 × 2 × 2 × 2 × 19 × 37 × 257 × 223
Composite number
| ω |
Distinct Factors |
5 |
Total number of distinct prime factors |
| Ω |
Total Factors |
8 |
Total number of prime factors |
| rad |
Radical |
80579266 |
Product of the distinct prime numbers |
The prime factorization of 644634128 is 2 × 2 × 2 × 2 × 19 × 37 × 257 × 223.
Since it has a total of 8 prime factors.
1, 2, 4, 8, 16, 19, 37, 38, 74, 76, 148, 152, 223, 257, 296, 304, 446, 514, 592, 703, 892, 1028, 1406, 1784, 2056, 2812, 3568, 4112, 4237, 4883, 5624, 8251, 8474, 9509, 9766, 11248, 16502, 16948, 19018, 19532, 33004, 33896, 38036, 39064, 57311, 66008, 67792, 76072, 78128, 114622, 132016, 152144, 156769, 180671, 229244, 313538, 361342, 458488, 627076, 722684, 916976, 1088909, 1254152, 1445368, 2120507, 2177818, 2508304, 2890736, 4241014, 4355636, 8482028, 8711272, 16964056, 17422544, 33928112, 40289633, 80579266, 161158532, 322317064, 644634128
80 divisors
| τ |
Total Divisors |
80 |
Total number of the positive divisors of n |
| σ |
Sum of Divisors |
1 |
Sum of all the positive divisors of n |
| s |
Aliquot Sum |
-644634127 |
Sum of the proper positive divisors of n |
| A |
Arithmetic Mean |
0.0125 |
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 |
80 |
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors |
The number 644634128 can be divided by 80 positive divisors.
The sum of these divisors (counting 644634128) is 1, the average is 0.0125.