28285575 has 24 divisors (see below), whose sum is σ = 48034128. Its totient is φ = 14676480.

The previous prime is 28285571. The next prime is 28285583. The reversal of 28285575 is 57558282.

It is not a de Polignac number, because 28285575 - 2² = 28285571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285571) 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, 2322 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (2001422).

Almost surely, 2^28285575 is an apocalyptic number.

28285575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28285575 is a deficient number, since it is larger than the sum of its proper divisors (19748553).

28285575 is a wasteful number, since it uses less digits than its factorization.

28285575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10243 (or 10238 counting only the distinct ones).

The product of its digits is 224000, while the sum is 42.

The square root of 28285575 is about 5318.4184679282. The cubic root of 28285575 is about 304.6877571332.

The spelling of 28285575 in words is "twenty-eight million, two hundred eighty-five thousand, five hundred seventy-five".