91991808 is an even 8-digits composite number following 91991807
and preceding 91991809. In scientific notation, it is written as 9.1991808 × 10^7.
The sum of its digits is 45. It has a total of 11 prime factors and 72 positive divisors.
There are 30661632 positive integers (up to 91991808) that are relatively prime to 91991808.
Prime Factorization
2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 9 × 3 × 13309
Composite number
| ω |
Distinct Factors |
4 |
Total number of distinct prime factors |
| Ω |
Total Factors |
11 |
Total number of prime factors |
| rad |
Radical |
718686 |
Product of the distinct prime numbers |
The prime factorization of 91991808 is 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 9 × 3 × 13309.
Since it has a total of 11 prime factors.
1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 64, 72, 96, 108, 128, 144, 192, 216, 256, 288, 384, 432, 576, 768, 864, 1152, 1728, 2304, 3456, 6912, 13309, 26618, 39927, 53236, 79854, 106472, 119781, 159708, 212944, 239562, 319416, 359343, 425888, 479124, 638832, 718686, 851776, 958248, 1277664, 1437372, 1703552, 1916496, 2555328, 2874744, 3407104, 3832992, 5110656, 5749488, 7665984, 10221312, 11498976, 15331968, 22997952, 30663936, 45995904, 91991808
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 |
-91991807 |
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 91991808 can be divided by 72 positive divisors.
The sum of these divisors (counting 91991808) is 1, the average is 0.013888888888889.