30765972 has 24 divisors (see below), whose sum is σ = 72115456. Its totient is φ = 10208448.

The previous prime is 30765947. The next prime is 30765989. The reversal of 30765972 is 27956703.

It is a self number, because there is not a number n which added to its sum of digits gives 30765972.

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, 3073 + ... + 8424.

Almost surely, 2^30765972 is an apocalyptic number.

It is an amenable number.

30765972 is an abundant number, since it is smaller than the sum of its proper divisors (41349484).

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

30765972 is a wasteful number, since it uses less digits than its factorization.

30765972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11727 (or 11725 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 30765972 is about 5546.7082129854. The cubic root of 30765972 is about 313.3455611143.

The spelling of 30765972 in words is "thirty million, seven hundred sixty-five thousand, nine hundred seventy-two".