30555328 has 56 divisors (see below), whose sum is σ = 63733680. Its totient is φ = 14515200.

The previous prime is 30555277. The next prime is 30555353. The reversal of 30555328 is 82355503.

It is a self number, because there is not a number n which added to its sum of digits gives 30555328.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 187375 + ... + 187537.

Almost surely, 2^30555328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30555328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31866840).

30555328 is an abundant number, since it is smaller than the sum of its proper divisors (33178352).

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

30555328 is a wasteful number, since it uses less digits than its factorization.

30555328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 30555328 is about 5527.6874007129. The cubic root of 30555328 is about 312.6287998133.

The spelling of 30555328 in words is "thirty million, five hundred fifty-five thousand, three hundred twenty-eight".