30933912 has 32 divisors (see below), whose sum is σ = 77497200. Its totient is φ = 10289664.

The previous prime is 30933907. The next prime is 30933913. The reversal of 30933912 is 21933903.

It is a self number, because there is not a number n which added to its sum of digits gives 30933912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30933913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13764 + ... + 15852.

Almost surely, 2^30933912 is an apocalyptic number.

It is an amenable number.

30933912 is an abundant number, since it is smaller than the sum of its proper divisors (46563288).

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

30933912 is a wasteful number, since it uses less digits than its factorization.

30933912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 2711 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 30933912 is about 5561.8263187554. The cubic root of 30933912 is about 313.9146724753.

Subtracting from 30933912 its reverse (21933903), we obtain a palindrome (9000009).

The spelling of 30933912 in words is "thirty million, nine hundred thirty-three thousand, nine hundred twelve".