30940812 has 48 divisors (see below), whose sum is σ = 91678720. Its totient is φ = 8840016.

The previous prime is 30940807. The next prime is 30940813. The reversal of 30940812 is 21804903.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (30940813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19708 + ... + 21219.

Almost surely, 2^30940812 is an apocalyptic number.

It is an amenable number.

30940812 is an abundant number, since it is smaller than the sum of its proper divisors (60737908).

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

30940812 is a wasteful number, since it uses less digits than its factorization.

30940812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40947 (or 40939 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30940812 is about 5562.4465840132. The cubic root of 30940812 is about 313.9380109419.

The spelling of 30940812 in words is "thirty million, nine hundred forty thousand, eight hundred twelve".