78608172 has 24 divisors (see below), whose sum is σ = 183753136. Its totient is φ = 26155008.

The previous prime is 78608137. The next prime is 78608191. The reversal of 78608172 is 27180687.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78608172.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1248 + ... + 12600.

Almost surely, 2^78608172 is an apocalyptic number.

It is an amenable number.

78608172 is an abundant number, since it is smaller than the sum of its proper divisors (105144964).

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

78608172 is a wasteful number, since it uses less digits than its factorization.

78608172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11937 (or 11935 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 78608172 is about 8866.1249709216. The cubic root of 78608172 is about 428.3734694012.

The spelling of 78608172 in words is "seventy-eight million, six hundred eight thousand, one hundred seventy-two".