78372392 has 16 divisors (see below), whose sum is σ = 167940960. Its totient is φ = 33588144.

The previous prime is 78372389. The next prime is 78372403. The reversal of 78372392 is 29327387.

It is a super-2 number, since 2×78372392² = 12284463655603328, 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, 699698 + ... + 699809.

It is an arithmetic number, because the mean of its divisors is an integer number (10496310).

Almost surely, 2^78372392 is an apocalyptic number.

It is an amenable number.

78372392 is an abundant number, since it is smaller than the sum of its proper divisors (89568568).

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

78372392 is a wasteful number, since it uses less digits than its factorization.

78372392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399520 (or 1399516 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 78372392 is about 8852.8183083129. The cubic root of 78372392 is about 427.9447478680.

The spelling of 78372392 in words is "seventy-eight million, three hundred seventy-two thousand, three hundred ninety-two".