30556628 has 12 divisors (see below), whose sum is σ = 53699520. Its totient is φ = 15213912.

The previous prime is 30556621. The next prime is 30556651. The reversal of 30556628 is 82665503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30556621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15026 + ... + 16937.

It is an arithmetic number, because the mean of its divisors is an integer number (4474960).

Almost surely, 2^30556628 is an apocalyptic number.

It is an amenable number.

30556628 is a deficient number, since it is larger than the sum of its proper divisors (23142892).

30556628 is a wasteful number, since it uses less digits than its factorization.

30556628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32206 (or 32204 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 30556628 is about 5527.8049893244. The cubic root of 30556628 is about 312.6332334283.

The spelling of 30556628 in words is "thirty million, five hundred fifty-six thousand, six hundred twenty-eight".