78739656 has 32 divisors (see below), whose sum is σ = 197561760. Its totient is φ = 26151552.

The previous prime is 78739651. The next prime is 78739657. The reversal of 78739656 is 65693787.

It is a junction number, because it is equal to n+sod(n) for n = 78739599 and 78739608.

It is not an unprimeable number, because it can be changed into a prime (78739651) 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, 996 + ... + 12588.

It is an arithmetic number, because the mean of its divisors is an integer number (6173805).

Almost surely, 2^78739656 is an apocalyptic number.

It is an amenable number.

78739656 is an abundant number, since it is smaller than the sum of its proper divisors (118822104).

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

78739656 is a wasteful number, since it uses less digits than its factorization.

78739656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11885 (or 11881 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 51.

The square root of 78739656 is about 8873.5368371355. The cubic root of 78739656 is about 428.6121760622.

The spelling of 78739656 in words is "seventy-eight million, seven hundred thirty-nine thousand, six hundred fifty-six".