30528925 has 24 divisors (see below), whose sum is σ = 44280896. Its totient is φ = 20442240.

The previous prime is 30528917. The next prime is 30528929. The reversal of 30528925 is 52982503.

It is not a de Polignac number, because 30528925 - 2³ = 30528917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30528929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5497 + ... + 9553.

Almost surely, 2^30528925 is an apocalyptic number.

30528925 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30528925 is a deficient number, since it is larger than the sum of its proper divisors (13751971).

30528925 is a wasteful number, since it uses less digits than its factorization.

30528925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117 (or 4112 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 30528925 is about 5525.2986344631. The cubic root of 30528925 is about 312.5387258675.

The spelling of 30528925 in words is "thirty million, five hundred twenty-eight thousand, nine hundred twenty-five".