78631656 has 16 divisors (see below), whose sum is σ = 196579200. Its totient is φ = 26210544.

The previous prime is 78631639. The next prime is 78631661. The reversal of 78631656 is 65613687.

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, 1638136 + ... + 1638183.

It is an arithmetic number, because the mean of its divisors is an integer number (12286200).

Almost surely, 2^78631656 is an apocalyptic number.

It is an amenable number.

78631656 is an abundant number, since it is smaller than the sum of its proper divisors (117947544).

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

78631656 is a wasteful number, since it uses less digits than its factorization.

78631656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276328 (or 3276324 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 78631656 is about 8867.4492386481. The cubic root of 78631656 is about 428.4161236642.

The spelling of 78631656 in words is "seventy-eight million, six hundred thirty-one thousand, six hundred fifty-six".