30875928 has 32 divisors (see below), whose sum is σ = 77414400. Its totient is φ = 10262048.

The previous prime is 30875921. The next prime is 30875941. The reversal of 30875928 is 82957803.

It is a super-2 number, since 2×30875928² = 1906645859722368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30875928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30875921) 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 7 ways as a sum of consecutive naturals, for example, 7513 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (2419200).

Almost surely, 2^30875928 is an apocalyptic number.

It is an amenable number.

30875928 is an abundant number, since it is smaller than the sum of its proper divisors (46538472).

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

30875928 is a wasteful number, since it uses less digits than its factorization.

30875928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751 (or 3747 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 30875928 is about 5556.6111974836. The cubic root of 30875928 is about 313.7184109189.

The spelling of 30875928 in words is "thirty million, eight hundred seventy-five thousand, nine hundred twenty-eight".