28812256 has 24 divisors (see below), whose sum is σ = 61881624. Its totient is φ = 13096320.

The previous prime is 28812247. The next prime is 28812323. The reversal of 28812256 is 65221882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40575 + ... + 41278.

It is an arithmetic number, because the mean of its divisors is an integer number (2578401).

Almost surely, 2^28812256 is an apocalyptic number.

It is an amenable number.

28812256 is an abundant number, since it is smaller than the sum of its proper divisors (33069368).

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

28812256 is a wasteful number, since it uses less digits than its factorization.

28812256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81874 (or 81866 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 28812256 is about 5367.7049099219. The cubic root of 28812256 is about 306.5672477559.

It can be divided in two parts, 288 and 12256, that added together give a square (12544 = 112²).

The spelling of 28812256 in words is "twenty-eight million, eight hundred twelve thousand, two hundred fifty-six".