30955988 has 12 divisors (see below), whose sum is σ = 61912032. Its totient is φ = 13266840.

The previous prime is 30955979. The next prime is 30955993. The reversal of 30955988 is 88955903.

30955988 is an admirable number.

It is a super-2 number, since 2×30955988² = 1916546386112288, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 552758 + ... + 552813.

It is an arithmetic number, because the mean of its divisors is an integer number (5159336).

Almost surely, 2^30955988 is an apocalyptic number.

It is an amenable number.

30955988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30955988 is a wasteful number, since it uses less digits than its factorization.

30955988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105582 (or 1105580 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 30955988 is about 5563.8105647119. The cubic root of 30955988 is about 313.9893298334.

The spelling of 30955988 in words is "thirty million, nine hundred fifty-five thousand, nine hundred eighty-eight".