78725028 has 24 divisors (see below), whose sum is σ = 194497632. Its totient is φ = 24697984.

The previous prime is 78724979. The next prime is 78725041. The reversal of 78725028 is 82052787.

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, 192750 + ... + 193157.

It is an arithmetic number, because the mean of its divisors is an integer number (8104068).

Almost surely, 2^78725028 is an apocalyptic number.

It is an amenable number.

78725028 is an abundant number, since it is smaller than the sum of its proper divisors (115772604).

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

78725028 is a wasteful number, since it uses less digits than its factorization.

78725028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385931 (or 385929 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 78725028 is about 8872.7125502858. The cubic root of 78725028 is about 428.5856323546.

The spelling of 78725028 in words is "seventy-eight million, seven hundred twenty-five thousand, twenty-eight".