30988 has 12 divisors (see below), whose sum is σ = 55552. Its totient is φ = 15120.

The previous prime is 30983. The next prime is 31013. The reversal of 30988 is 88903.

It is a super-2 number, since 2×30988² = 1920512288, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181 + ... + 307.

2³⁰⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

30988 is a deficient number, since it is larger than the sum of its proper divisors (24564).

30988 is a wasteful number, since it uses less digits than its factorization.

30988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 30988 is about 176.0340876081. The cubic root of 30988 is about 31.4097526064.

The spelling of 30988 in words is "thirty thousand, nine hundred eighty-eight".