78306568 has 16 divisors (see below), whose sum is σ = 146944080. Its totient is φ = 39121488.

The previous prime is 78306523. The next prime is 78306577. The reversal of 78306568 is 86560387.

It is a super-2 number, since 2×78306568² = 12263837183877248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8971 + ... + 15397.

It is an arithmetic number, because the mean of its divisors is an integer number (9184005).

Almost surely, 2^78306568 is an apocalyptic number.

It is an amenable number.

78306568 is a deficient number, since it is larger than the sum of its proper divisors (68637512).

78306568 is a wasteful number, since it uses less digits than its factorization.

78306568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7956 (or 7952 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 78306568 is about 8849.0998412268. The cubic root of 78306568 is about 427.8249058152.

The spelling of 78306568 in words is "seventy-eight million, three hundred six thousand, five hundred sixty-eight".