28185575 has 24 divisors (see below), whose sum is σ = 40376880. Its totient is φ = 19289600.

The previous prime is 28185523. The next prime is 28185583. The reversal of 28185575 is 57558182.

It is not a de Polignac number, because 28185575 - 2⁸ = 28185319 is a prime.

It is a congruent number.

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, 1661 + ... + 7689.

It is an arithmetic number, because the mean of its divisors is an integer number (1682370).

Almost surely, 2^28185575 is an apocalyptic number.

28185575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28185575 is a deficient number, since it is larger than the sum of its proper divisors (12191305).

28185575 is a wasteful number, since it uses less digits than its factorization.

28185575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067 (or 6062 counting only the distinct ones).

The product of its digits is 112000, while the sum is 41.

The square root of 28185575 is about 5309.0088528839. The cubic root of 28185575 is about 304.3282717472.

The spelling of 28185575 in words is "twenty-eight million, one hundred eighty-five thousand, five hundred seventy-five".