30388128 has 48 divisors (see below), whose sum is σ = 80085600. Its totient is φ = 10089216.

The previous prime is 30388097. The next prime is 30388139. The reversal of 30388128 is 82188303.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33051 + ... + 33957.

It is an arithmetic number, because the mean of its divisors is an integer number (1668450).

Almost surely, 2^30388128 is an apocalyptic number.

It is an amenable number.

30388128 is an abundant number, since it is smaller than the sum of its proper divisors (49697472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30388128 is a wasteful number, since it uses less digits than its factorization.

30388128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 30388128 is about 5512.5427889496. The cubic root of 30388128 is about 312.0575173381.

The spelling of 30388128 in words is "thirty million, three hundred eighty-eight thousand, one hundred twenty-eight".