30813816 has 32 divisors (see below), whose sum is σ = 84038400. Its totient is φ = 9337440.

The previous prime is 30813803. The next prime is 30813817. The reversal of 30813816 is 61831803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30813817) 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, 58096 + ... + 58623.

It is an arithmetic number, because the mean of its divisors is an integer number (2626200).

Almost surely, 2^30813816 is an apocalyptic number.

It is an amenable number.

30813816 is an abundant number, since it is smaller than the sum of its proper divisors (53224584).

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

30813816 is a wasteful number, since it uses less digits than its factorization.

30813816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116739 (or 116735 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 30813816 is about 5551.0193658462. The cubic root of 30813816 is about 313.5079043308.

The spelling of 30813816 in words is "thirty million, eight hundred thirteen thousand, eight hundred sixteen".