78457372 has 24 divisors (see below), whose sum is σ = 157105760. Its totient is φ = 33583680.

The previous prime is 78457333. The next prime is 78457387. The reversal of 78457372 is 27375487.

It is a super-2 number, since 2×78457372² = 12311118442292768, which contains 22 as substring.

It is a congruent number.

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, 37654 + ... + 39682.

Almost surely, 2^78457372 is an apocalyptic number.

It is an amenable number.

78457372 is an abundant number, since it is smaller than the sum of its proper divisors (78648388).

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

78457372 is a wasteful number, since it uses less digits than its factorization.

78457372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421 (or 3419 counting only the distinct ones).

The product of its digits is 329280, while the sum is 43.

The square root of 78457372 is about 8857.6166094497. The cubic root of 78457372 is about 428.0993669772.

The spelling of 78457372 in words is "seventy-eight million, four hundred fifty-seven thousand, three hundred seventy-two".