78945912 has 48 divisors (see below), whose sum is σ = 225069000. Its totient is φ = 24929856.

The previous prime is 78945907. The next prime is 78945929. The reversal of 78945912 is 21954987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27487 + ... + 30222.

Almost surely, 2^78945912 is an apocalyptic number.

78945912 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78945912 is an abundant number, since it is smaller than the sum of its proper divisors (146123088).

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

78945912 is a wasteful number, since it uses less digits than its factorization.

78945912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57740 (or 57733 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 78945912 is about 8885.1512086177. The cubic root of 78945912 is about 428.9860950389.

The spelling of 78945912 in words is "seventy-eight million, nine hundred forty-five thousand, nine hundred twelve".