28075825 has 12 divisors (see below), whose sum is σ = 36646960. Its totient is φ = 21278160.

The previous prime is 28075819. The next prime is 28075841. The reversal of 28075825 is 52857082.

It is not a de Polignac number, because 28075825 - 2⁵ = 28075793 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

28075825 is a Rhonda number in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29079 + ... + 30028.

Almost surely, 2^28075825 is an apocalyptic number.

28075825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28075825 is a deficient number, since it is larger than the sum of its proper divisors (8571135).

28075825 is a wasteful number, since it uses less digits than its factorization.

28075825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59136 (or 59131 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 28075825 is about 5298.6625671012. The cubic root of 28075825 is about 303.9327565087.

It can be divided in two parts, 28075 and 825, that added together give a square (28900 = 170²).

The spelling of 28075825 in words is "twenty-eight million, seventy-five thousand, eight hundred twenty-five".