77320524 has 12 divisors (see below), whose sum is σ = 180414584. Its totient is φ = 25773504.

The previous prime is 77320511. The next prime is 77320531. The reversal of 77320524 is 42502377.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 77320491 and 77320500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3221677 + ... + 3221700.

Almost surely, 2^77320524 is an apocalyptic number.

It is an amenable number.

77320524 is an abundant number, since it is smaller than the sum of its proper divisors (103094060).

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

77320524 is a wasteful number, since it uses less digits than its factorization.

77320524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443384 (or 6443382 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 77320524 is about 8793.2089705636. The cubic root of 77320524 is about 426.0215775180.

The spelling of 77320524 in words is "seventy-seven million, three hundred twenty thousand, five hundred twenty-four".