28228585 has 64 divisors (see below), whose sum is σ = 47278080. Its totient is φ = 15621120.

The previous prime is 28228573. The next prime is 28228621. The reversal of 28228585 is 58582282.

It is not a de Polignac number, because 28228585 - 2⁵ = 28228553 is a prime.

It is a super-2 number, since 2×28228585² = 1593706022204450, which contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 124242 + ... + 124468.

It is an arithmetic number, because the mean of its divisors is an integer number (738720).

Almost surely, 2^28228585 is an apocalyptic number.

It is an amenable number.

28228585 is a deficient number, since it is larger than the sum of its proper divisors (19049495).

28228585 is a wasteful number, since it uses less digits than its factorization.

28228585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its digits is 102400, while the sum is 40.

The square root of 28228585 is about 5313.0579706982. The cubic root of 28228585 is about 304.4829904496.

The spelling of 28228585 in words is "twenty-eight million, two hundred twenty-eight thousand, five hundred eighty-five".