78355372 has 6 divisors (see below), whose sum is σ = 137121908. Its totient is φ = 39177684.

The previous prime is 78355349. The next prime is 78355391. The reversal of 78355372 is 27355387.

It is a super-2 number, since 2×78355372² = 12279128642516768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9794418 + ... + 9794425.

Almost surely, 2^78355372 is an apocalyptic number.

It is an amenable number.

78355372 is a deficient number, since it is larger than the sum of its proper divisors (58766536).

78355372 is a wasteful number, since it uses less digits than its factorization.

78355372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19588847 (or 19588845 counting only the distinct ones).

The product of its digits is 176400, while the sum is 40.

The square root of 78355372 is about 8851.8569803177. The cubic root of 78355372 is about 427.9137669459.

The spelling of 78355372 in words is "seventy-eight million, three hundred fifty-five thousand, three hundred seventy-two".