Base | Representation |
---|---|
bin | 110110100111… |
… | …0001010000000 |
3 | 1222212122021121 |
4 | 1231032022000 |
5 | 24312203210 |
6 | 2501402024 |
7 | 465236200 |
oct | 155161200 |
9 | 58778247 |
10 | 28631680 |
11 | 15186450 |
12 | 9709314 |
13 | 5c1622c |
14 | 3b34400 |
15 | 27a86da |
hex | 1b4e280 |
28631680 has 192 divisors, whose sum is σ = 87907680. Its totient is φ = 8816640.
The previous prime is 28631663. The next prime is 28631717. The reversal of 28631680 is 8613682.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344919 + ... + 345001.
Almost surely, 228631680 is an apocalyptic number.
28631680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 28631680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43953840).
28631680 is an abundant number, since it is smaller than the sum of its proper divisors (59276000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28631680 is a wasteful number, since it uses less digits than its factorization.
28631680 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 127 (or 108 counting only the distinct ones).
The product of its (nonzero) digits is 13824, while the sum is 34.
The square root of 28631680 is about 5350.8578751449. The cubic root of 28631680 is about 305.9254521008.
The spelling of 28631680 in words is "twenty-eight million, six hundred thirty-one thousand, six hundred eighty".
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