30556028 has 12 divisors (see below), whose sum is σ = 56287560. Its totient is φ = 14473872.

The previous prime is 30555977. The next prime is 30556081. The reversal of 30556028 is 82065503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200951 + ... + 201102.

It is an arithmetic number, because the mean of its divisors is an integer number (4690630).

Almost surely, 2^30556028 is an apocalyptic number.

30556028 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30556028 is a deficient number, since it is larger than the sum of its proper divisors (25731532).

30556028 is a wasteful number, since it uses less digits than its factorization.

30556028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402076 (or 402074 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 30556028 is about 5527.7507179684. The cubic root of 30556028 is about 312.6311871601.

The spelling of 30556028 in words is "thirty million, five hundred fifty-six thousand, twenty-eight".