30988628 has 12 divisors (see below), whose sum is σ = 59160192. Its totient is φ = 14085720.

The previous prime is 30988621. The next prime is 30988649. The reversal of 30988628 is 82688903.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 704287 = 30988628 / (3 + 0 + 9 + 8 + 8 + 6 + 2 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30988621) by changing a digit.

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, 352100 + ... + 352187.

It is an arithmetic number, because the mean of its divisors is an integer number (4930016).

Almost surely, 2^30988628 is an apocalyptic number.

It is an amenable number.

30988628 is a deficient number, since it is larger than the sum of its proper divisors (28171564).

30988628 is a wasteful number, since it uses less digits than its factorization.

30988628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704302 (or 704300 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 30988628 is about 5566.7430334083. The cubic root of 30988628 is about 314.0996478736.

The spelling of 30988628 in words is "thirty million, nine hundred eighty-eight thousand, six hundred twenty-eight".