30912980 has 24 divisors (see below), whose sum is σ = 74191488. Its totient is φ = 10598688.

The previous prime is 30912971. The next prime is 30912997. The reversal of 30912980 is 8921903.

It is a super-2 number, since 2×30912980² = 1911224664960800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110264 + ... + 110543.

It is an arithmetic number, because the mean of its divisors is an integer number (3091312).

Almost surely, 2^30912980 is an apocalyptic number.

It is an amenable number.

30912980 is an abundant number, since it is smaller than the sum of its proper divisors (43278508).

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

30912980 is a wasteful number, since it uses less digits than its factorization.

30912980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220823 (or 220821 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 30912980 is about 5559.9442443248. The cubic root of 30912980 is about 313.8438511215.

The spelling of 30912980 in words is "thirty million, nine hundred twelve thousand, nine hundred eighty".