28175285 has 8 divisors (see below), whose sum is σ = 34286976. Its totient is φ = 22222480.

The previous prime is 28175281. The next prime is 28175297. The reversal of 28175285 is 58257182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28175285 - 2² = 28175281 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 (28175281) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39329 + ... + 40038.

It is an arithmetic number, because the mean of its divisors is an integer number (4285872).

Almost surely, 2^28175285 is an apocalyptic number.

It is an amenable number.

28175285 is a deficient number, since it is larger than the sum of its proper divisors (6111691).

28175285 is an equidigital number, since it uses as much as digits as its factorization.

28175285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79443.

The product of its digits is 44800, while the sum is 38.

The square root of 28175285 is about 5308.0396569732. The cubic root of 28175285 is about 304.2912324806.

The spelling of 28175285 in words is "twenty-eight million, one hundred seventy-five thousand, two hundred eighty-five".