78132928 has 28 divisors (see below), whose sum is σ = 155338272. Its totient is φ = 38992640.

The previous prime is 78132919. The next prime is 78132953. The reversal of 78132928 is 82923187.

It is a super-2 number, since 2×78132928² = 12209508875706368, which contains 22 as substring.

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, 51801 + ... + 53287.

Almost surely, 2^78132928 is an apocalyptic number.

It is an amenable number.

78132928 is a deficient number, since it is larger than the sum of its proper divisors (77205344).

78132928 is a wasteful number, since it uses less digits than its factorization.

78132928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320 (or 2310 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 78132928 is about 8839.2832288597. The cubic root of 78132928 is about 427.5084466487.

The spelling of 78132928 in words is "seventy-eight million, one hundred thirty-two thousand, nine hundred twenty-eight".