30205928 has 16 divisors (see below), whose sum is σ = 56700000. Its totient is φ = 15085936.

The previous prime is 30205927. The next prime is 30205933. The reversal of 30205928 is 82950203.

It is a self number, because there is not a number n which added to its sum of digits gives 30205928.

It is not an unprimeable number, because it can be changed into a prime (30205927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8573 + ... + 11571.

It is an arithmetic number, because the mean of its divisors is an integer number (3543750).

Almost surely, 2^30205928 is an apocalyptic number.

It is an amenable number.

30205928 is a deficient number, since it is larger than the sum of its proper divisors (26494072).

30205928 is a wasteful number, since it uses less digits than its factorization.

30205928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264 (or 4260 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 30205928 is about 5495.9919941718. The cubic root of 30205928 is about 311.4325924427.

The spelling of 30205928 in words is "thirty million, two hundred five thousand, nine hundred twenty-eight".