78782656 has 28 divisors (see below), whose sum is σ = 161381440. Its totient is φ = 38119680.

The previous prime is 78782651. The next prime is 78782699. The reversal of 78782656 is 65628787.

It is not an unprimeable number, because it can be changed into a prime (78782651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17871 + ... + 21838.

Almost surely, 2^78782656 is an apocalyptic number.

It is an amenable number.

78782656 is an abundant number, since it is smaller than the sum of its proper divisors (82598784).

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

78782656 is a wasteful number, since it uses less digits than its factorization.

78782656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39752 (or 39742 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 78782656 is about 8875.9594410971. The cubic root of 78782656 is about 428.6901840638.

The spelling of 78782656 in words is "seventy-eight million, seven hundred eighty-two thousand, six hundred fifty-six".