129218400 is an even 9-digits composite number following 129218399
and preceding 129218401. In scientific notation, it is written as 1.29218400 × 10^8.
The sum of its digits is 27. It has a total of 9 prime factors and 72 positive divisors.
There are 33945600 positive integers (up to 129218400) that are relatively prime to 129218400.
Prime Factorization
2 × 2 × 2 × 2 × 2 × 15 × 15 × 131 × 137
Composite number
| ω |
Distinct Factors |
4 |
Total number of distinct prime factors |
| Ω |
Total Factors |
9 |
Total number of prime factors |
| rad |
Radical |
538410 |
Product of the distinct prime numbers |
The prime factorization of 129218400 is 2 × 2 × 2 × 2 × 2 × 15 × 15 × 131 × 137.
Since it has a total of 9 prime factors.
1, 2, 4, 8, 15, 16, 30, 32, 60, 120, 131, 137, 225, 240, 262, 274, 450, 480, 524, 548, 900, 1048, 1096, 1800, 1965, 2055, 2096, 2192, 3600, 3930, 4110, 4192, 4384, 7200, 7860, 8220, 15720, 16440, 17947, 29475, 30825, 31440, 32880, 35894, 58950, 61650, 62880, 65760, 71788, 117900, 123300, 143576, 235800, 246600, 269205, 287152, 471600, 493200, 538410, 574304, 943200, 986400, 1076820, 2153640, 4038075, 4307280, 8076150, 8614560, 16152300, 32304600, 64609200, 129218400
72 divisors
| τ |
Total Divisors |
72 |
Total number of the positive divisors of n |
| σ |
Sum of Divisors |
1 |
Sum of all the positive divisors of n |
| s |
Aliquot Sum |
-129218399 |
Sum of the proper positive divisors of n |
| A |
Arithmetic Mean |
0.013888888888889 |
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 |
72 |
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors |
The number 129218400 can be divided by 72 positive divisors.
The sum of these divisors (counting 129218400) is 1, the average is 0.013888888888889.