77912372 has 12 divisors (see below), whose sum is σ = 138582276. Its totient is φ = 38317440.

The previous prime is 77912321. The next prime is 77912449. The reversal of 77912372 is 27321977.

It can be written as a sum of positive squares in 2 ways, for example, as 929296 + 76983076 = 964^2 + 8774^2 .

It is a congruent number.

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, 159413 + ... + 159900.

It is an arithmetic number, because the mean of its divisors is an integer number (11548523).

Almost surely, 2^77912372 is an apocalyptic number.

It is an amenable number.

77912372 is a deficient number, since it is larger than the sum of its proper divisors (60669904).

77912372 is a wasteful number, since it uses less digits than its factorization.

77912372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319378 (or 319376 counting only the distinct ones).

The product of its digits is 37044, while the sum is 38.

The square root of 77912372 is about 8826.7985136175. The cubic root of 77912372 is about 427.1058062770.

The spelling of 77912372 in words is "seventy-seven million, nine hundred twelve thousand, three hundred seventy-two".