30990860 has 24 divisors (see below), whose sum is σ = 66467520. Its totient is φ = 12132224.

The previous prime is 30990853. The next prime is 30990863. The reversal of 30990860 is 6809903.

It is a self number, because there is not a number n which added to its sum of digits gives 30990860.

It is not an unprimeable number, because it can be changed into a prime (30990863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15545 + ... + 17424.

It is an arithmetic number, because the mean of its divisors is an integer number (2769480).

Almost surely, 2^30990860 is an apocalyptic number.

It is an amenable number.

30990860 is an abundant number, since it is smaller than the sum of its proper divisors (35476660).

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

30990860 is a wasteful number, since it uses less digits than its factorization.

30990860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33025 (or 33023 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 30990860 is about 5566.9435060902. The cubic root of 30990860 is about 314.1071888505.

The spelling of 30990860 in words is "thirty million, nine hundred ninety thousand, eight hundred sixty".