28565248 has 36 divisors (see below), whose sum is σ = 57379168. Its totient is φ = 14192640.

The previous prime is 28565209. The next prime is 28565267. The reversal of 28565248 is 84256582.

It is a self number, because there is not a number n which added to its sum of digits gives 28565248.

It is a congruent number.

It is an unprimeable number.

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, 61465 + ... + 61927.

Almost surely, 2^28565248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28565248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28689584).

28565248 is an abundant number, since it is smaller than the sum of its proper divisors (28813920).

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

28565248 is an equidigital number, since it uses as much as digits as its factorization.

28565248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 706 counting only the distinct ones).

The product of its digits is 153600, while the sum is 40.

The square root of 28565248 is about 5344.6466674608. The cubic root of 28565248 is about 305.6886633630.

The spelling of 28565248 in words is "twenty-eight million, five hundred sixty-five thousand, two hundred forty-eight".