30528025 has 24 divisors (see below), whose sum is σ = 42640128. Its totient is φ = 21480000.

The previous prime is 30528011. The next prime is 30528119. The reversal of 30528025 is 52082503.

It is not a de Polignac number, because 30528025 - 2⁷ = 30527897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6735 + ... + 10315.

It is an arithmetic number, because the mean of its divisors is an integer number (1776672).

Almost surely, 2^30528025 is an apocalyptic number.

It is an amenable number.

30528025 is a deficient number, since it is larger than the sum of its proper divisors (12112103).

30528025 is a wasteful number, since it uses less digits than its factorization.

30528025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633 (or 3628 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 30528025 is about 5525.2171903012. The cubic root of 30528025 is about 312.5356545985.

Subtracting from 30528025 its product of nonzero digits (2400), we obtain a square (30525625 = 5525²).

The spelling of 30528025 in words is "thirty million, five hundred twenty-eight thousand, twenty-five".