30688988 has 36 divisors (see below), whose sum is σ = 59546760. Its totient is φ = 13828320.

The previous prime is 30688967. The next prime is 30688997. The reversal of 30688988 is 88988603.

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 11 ways as a sum of consecutive naturals, for example, 78698 + ... + 79086.

Almost surely, 2^30688988 is an apocalyptic number.

It is an amenable number.

30688988 is a deficient number, since it is larger than the sum of its proper divisors (28857772).

30688988 is a wasteful number, since it uses less digits than its factorization.

30688988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 30688988 is about 5539.7642549119. The cubic root of 30688988 is about 313.0839870295.

The spelling of 30688988 in words is "thirty million, six hundred eighty-eight thousand, nine hundred eighty-eight".