78656912 has 40 divisors (see below), whose sum is σ = 156760800. Its totient is φ = 38218752.

The previous prime is 78656911. The next prime is 78656917. The reversal of 78656912 is 21965687.

It is not an unprimeable number, because it can be changed into a prime (78656911) 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, 91139 + ... + 91997.

It is an arithmetic number, because the mean of its divisors is an integer number (3919020).

Almost surely, 2^78656912 is an apocalyptic number.

It is an amenable number.

78656912 is a deficient number, since it is larger than the sum of its proper divisors (78103888).

78656912 is a wasteful number, since it uses less digits than its factorization.

78656912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1017 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 78656912 is about 8868.8732091512. The cubic root of 78656912 is about 428.4619869544.

The spelling of 78656912 in words is "seventy-eight million, six hundred fifty-six thousand, nine hundred twelve".