78502928 has 20 divisors (see below), whose sum is σ = 173828160. Its totient is φ = 33644064.

The previous prime is 78502909. The next prime is 78502967. The reversal of 78502928 is 82920587.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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, 350348 + ... + 350571.

It is an arithmetic number, because the mean of its divisors is an integer number (8691408).

Almost surely, 2^78502928 is an apocalyptic number.

It is an amenable number.

78502928 is an abundant number, since it is smaller than the sum of its proper divisors (95325232).

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

78502928 is a wasteful number, since it uses less digits than its factorization.

78502928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700934 (or 700928 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 78502928 is about 8860.1878083932. The cubic root of 78502928 is about 428.1822090811.

The spelling of 78502928 in words is "seventy-eight million, five hundred two thousand, nine hundred twenty-eight".