28585564 has 12 divisors (see below), whose sum is σ = 57171184. Its totient is φ = 12250944.

The previous prime is 28585553. The next prime is 28585567. The reversal of 28585564 is 46558582.

28585564 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28585564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28585567) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 510429 + ... + 510484.

Almost surely, 2^28585564 is an apocalyptic number.

It is an amenable number.

28585564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28585564 is a wasteful number, since it uses less digits than its factorization.

28585564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020924 (or 1020922 counting only the distinct ones).

The product of its digits is 384000, while the sum is 43.

The square root of 28585564 is about 5346.5469230149. The cubic root of 28585564 is about 305.7611161929.

It can be divided in two parts, 285 and 85564, that added together give a square (85849 = 293²).

The spelling of 28585564 in words is "twenty-eight million, five hundred eighty-five thousand, five hundred sixty-four".