28528125 has 48 divisors (see below), whose sum is σ = 50621760. Its totient is φ = 14240000.

The previous prime is 28528117. The next prime is 28528163. The reversal of 28528125 is 52182582.

It is not a de Polignac number, because 28528125 - 2³ = 28528117 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159286 + ... + 159464.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^28528125 is an apocalyptic number.

28528125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28528125 is a deficient number, since it is larger than the sum of its proper divisors (22093635).

28528125 is an equidigital number, since it uses as much as digits as its factorization.

28528125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 204 counting only the distinct ones).

The product of its digits is 12800, while the sum is 33.

The square root of 28528125 is about 5341.1726240593. The cubic root of 28528125 is about 305.5561830413.

The spelling of 28528125 in words is "twenty-eight million, five hundred twenty-eight thousand, one hundred twenty-five".