30791868 has 12 divisors (see below), whose sum is σ = 71847720. Its totient is φ = 10263952.

The previous prime is 30791857. The next prime is 30791977. The reversal of 30791868 is 86819703.

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

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, 1282983 + ... + 1283006.

It is an arithmetic number, because the mean of its divisors is an integer number (5987310).

Almost surely, 2^30791868 is an apocalyptic number.

It is an amenable number.

30791868 is an abundant number, since it is smaller than the sum of its proper divisors (41055852).

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

30791868 is a wasteful number, since it uses less digits than its factorization.

30791868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565996 (or 2565994 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 30791868 is about 5549.0420794944. The cubic root of 30791868 is about 313.4334517343.

The spelling of 30791868 in words is "thirty million, seven hundred ninety-one thousand, eight hundred sixty-eight".