78904512 has 42 divisors (see below), whose sum is σ = 226167188. Its totient is φ = 26301312.

The previous prime is 78904481. The next prime is 78904523. The reversal of 78904512 is 21540987.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67918 + ... + 69069.

Almost surely, 2^78904512 is an apocalyptic number.

78904512 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78904512 is an abundant number, since it is smaller than the sum of its proper divisors (147262676).

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

78904512 is a wasteful number, since it uses less digits than its factorization.

78904512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137005 (or 136992 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 78904512 is about 8882.8211734786. The cubic root of 78904512 is about 428.9110937741.

The spelling of 78904512 in words is "seventy-eight million, nine hundred four thousand, five hundred twelve".