30813864 has 32 divisors (see below), whose sum is σ = 77748000. Its totient is φ = 10176192.

The previous prime is 30813841. The next prime is 30813901. The reversal of 30813864 is 46831803.

It is a super-2 number, since 2×30813864² = 1898988429220992, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3274 + ... + 8505.

It is an arithmetic number, because the mean of its divisors is an integer number (2429625).

Almost surely, 2^30813864 is an apocalyptic number.

It is an amenable number.

30813864 is an abundant number, since it is smaller than the sum of its proper divisors (46934136).

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

30813864 is a wasteful number, since it uses less digits than its factorization.

30813864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11897 (or 11893 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 30813864 is about 5551.0236893748. The cubic root of 30813864 is about 313.5080671189.

The spelling of 30813864 in words is "thirty million, eight hundred thirteen thousand, eight hundred sixty-four".