30745912 has 16 divisors (see below), whose sum is σ = 58209840. Its totient is φ = 15223296.

The previous prime is 30745909. The next prime is 30745919. The reversal of 30745912 is 21954703.

It is a super-2 number, since 2×30745912² = 1890622209423488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30745919) 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, 17833 + ... + 19480.

It is an arithmetic number, because the mean of its divisors is an integer number (3638115).

Almost surely, 2^30745912 is an apocalyptic number.

It is an amenable number.

30745912 is a deficient number, since it is larger than the sum of its proper divisors (27463928).

30745912 is a wasteful number, since it uses less digits than its factorization.

30745912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37422 (or 37418 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 30745912 is about 5544.8996384065. The cubic root of 30745912 is about 313.2774438820.

The spelling of 30745912 in words is "thirty million, seven hundred forty-five thousand, nine hundred twelve".