28244 has 12 divisors (see below), whose sum is σ = 51744. Its totient is φ = 13464.

The previous prime is 28229. The next prime is 28277. The reversal of 28244 is 44282.

28244 = T₈₀ + T₈₁ + ... + T₈₇.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28244.

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, 62 + ... + 245.

It is an arithmetic number, because the mean of its divisors is an integer number (4312).

2²⁸²⁴⁴ is an apocalyptic number.

It is an amenable number.

28244 is a deficient number, since it is larger than the sum of its proper divisors (23500).

28244 is a wasteful number, since it uses less digits than its factorization.

28244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 332 counting only the distinct ones).

The product of its digits is 512, while the sum is 20.

The square root of 28244 is about 168.0595132684. The cubic root of 28244 is about 30.4538404152.

Subtracting from 28244 its sum of digits (20), we obtain a square (28224 = 168²).

It can be divided in two parts, 28 and 244, that added together give a palindrome (272).

The spelling of 28244 in words is "twenty-eight thousand, two hundred forty-four".