78805928 has 32 divisors (see below), whose sum is σ = 152681760. Its totient is φ = 38109120.

The previous prime is 78805921. The next prime is 78805933. The reversal of 78805928 is 82950887.

It is not an unprimeable number, because it can be changed into a prime (78805921) 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, 35738 + ... + 37878.

It is an arithmetic number, because the mean of its divisors is an integer number (4771305).

Almost surely, 2^78805928 is an apocalyptic number.

It is an amenable number.

78805928 is a deficient number, since it is larger than the sum of its proper divisors (73875832).

78805928 is a wasteful number, since it uses less digits than its factorization.

78805928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297 (or 2293 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 78805928 is about 8877.2703011680. The cubic root of 78805928 is about 428.7323908823.

The spelling of 78805928 in words is "seventy-eight million, eight hundred five thousand, nine hundred twenty-eight".