30994872 has 16 divisors (see below), whose sum is σ = 77487240. Its totient is φ = 10331616.

The previous prime is 30994867. The next prime is 30994879. The reversal of 30994872 is 27849903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30994879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645703 + ... + 645750.

Almost surely, 2^30994872 is an apocalyptic number.

It is an amenable number.

30994872 is an abundant number, since it is smaller than the sum of its proper divisors (46492368).

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

30994872 is a wasteful number, since it uses less digits than its factorization.

30994872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291462 (or 1291458 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 30994872 is about 5567.3038357898. The cubic root of 30994872 is about 314.1207427786.

The spelling of 30994872 in words is "thirty million, nine hundred ninety-four thousand, eight hundred seventy-two".