78407568 has 40 divisors (see below), whose sum is σ = 225060000. Its totient is φ = 26135712.

The previous prime is 78407557. The next prime is 78407569. The reversal of 78407568 is 86570487.

78407568 is a `hidden beast` number, since 7 + 84 + 0 + 7 + 568 = 666.

It is a super-2 number, since 2×78407568² = 12295493439349248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78407569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90318 + ... + 91181.

It is an arithmetic number, because the mean of its divisors is an integer number (5626500).

Almost surely, 2^78407568 is an apocalyptic number.

It is an amenable number.

78407568 is an abundant number, since it is smaller than the sum of its proper divisors (146652432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78407568 is a wasteful number, since it uses less digits than its factorization.

78407568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181516 (or 181504 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 78407568 is about 8854.8047973967. The cubic root of 78407568 is about 428.0087633225.

The spelling of 78407568 in words is "seventy-eight million, four hundred seven thousand, five hundred sixty-eight".