28324564 has 12 divisors (see below), whose sum is σ = 49660884. Its totient is φ = 14135744.

The previous prime is 28324559. The next prime is 28324589. The reversal of 28324564 is 46542382.

It can be written as a sum of positive squares in 2 ways, for example, as 15147664 + 13176900 = 3892^2 + 3630^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4129 + ... + 8584.

It is an arithmetic number, because the mean of its divisors is an integer number (4138407).

Almost surely, 2^28324564 is an apocalyptic number.

It is an amenable number.

28324564 is a deficient number, since it is larger than the sum of its proper divisors (21336320).

28324564 is a wasteful number, since it uses less digits than its factorization.

28324564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13274 (or 13272 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 28324564 is about 5322.0826750437. The cubic root of 28324564 is about 304.8276873143.

It can be divided in two parts, 2832 and 4564, that added together give a square (7396 = 86²).

The spelling of 28324564 in words is "twenty-eight million, three hundred twenty-four thousand, five hundred sixty-four".