Base | Representation |
---|---|
bin | 1000001001111… |
… | …10111110110000 |
3 | 11202201212022000 |
4 | 10010332332300 |
5 | 120003243113 |
6 | 10442214000 |
7 | 1460343555 |
oct | 404767660 |
9 | 152655260 |
10 | 68415408 |
11 | 35689566 |
12 | 1aab4300 |
13 | 112354b9 |
14 | 912ca2c |
15 | 6016373 |
hex | 413efb0 |
68415408 has 160 divisors (see below), whose sum is σ = 209510400. Its totient is φ = 21337344.
The previous prime is 68415377. The next prime is 68415433. The reversal of 68415408 is 80451486.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538641 + ... + 538767.
It is an arithmetic number, because the mean of its divisors is an integer number (1309440).
Almost surely, 268415408 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 68415408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104755200).
68415408 is an abundant number, since it is smaller than the sum of its proper divisors (141094992).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
68415408 is a wasteful number, since it uses less digits than its factorization.
68415408 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 216 (or 204 counting only the distinct ones).
The product of its (nonzero) digits is 30720, while the sum is 36.
The square root of 68415408 is about 8271.3607103064. The cubic root of 68415408 is about 408.9949764549.
The spelling of 68415408 in words is "sixty-eight million, four hundred fifteen thousand, four hundred eight".
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