28538256 has 40 divisors (see below), whose sum is σ = 74059744. Its totient is φ = 9469440.

The previous prime is 28538243. The next prime is 28538267. The reversal of 28538256 is 65283582.

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 7 ways as a sum of consecutive naturals, for example, 10335 + ... + 12801.

Almost surely, 2^28538256 is an apocalyptic number.

It is an amenable number.

28538256 is an abundant number, since it is smaller than the sum of its proper divisors (45521488).

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

28538256 is a wasteful number, since it uses less digits than its factorization.

28538256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719 (or 2713 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 28538256 is about 5342.1209271225. The cubic root of 28538256 is about 305.5923487938.

The spelling of 28538256 in words is "twenty-eight million, five hundred thirty-eight thousand, two hundred fifty-six".