30513938 has 32 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 12012480.

The previous prime is 30513911. The next prime is 30513941. The reversal of 30513938 is 83931503.

It is a super-2 number, since 2×30513938² = 1862200824535688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70583 + ... + 71013.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^30513938 is an apocalyptic number.

30513938 is a deficient number, since it is larger than the sum of its proper divisors (26095342).

30513938 is a wasteful number, since it uses less digits than its factorization.

30513938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 30513938 is about 5523.9422516895. The cubic root of 30513938 is about 312.4875745460.

The spelling of 30513938 in words is "thirty million, five hundred thirteen thousand, nine hundred thirty-eight".