30991088 has 10 divisors (see below), whose sum is σ = 60045264. Its totient is φ = 15495536.

The previous prime is 30991067. The next prime is 30991091. The reversal of 30991088 is 88019903.

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 as a sum of consecutive naturals, namely, 968456 + ... + 968487.

Almost surely, 2^30991088 is an apocalyptic number.

It is an amenable number.

30991088 is a deficient number, since it is larger than the sum of its proper divisors (29054176).

30991088 is a wasteful number, since it uses less digits than its factorization.

30991088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936951 (or 1936945 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 30991088 is about 5566.9639840761. The cubic root of 30991088 is about 314.1079591449.

The spelling of 30991088 in words is "thirty million, nine hundred ninety-one thousand, eighty-eight".