28144 has 10 divisors (see below), whose sum is σ = 54560. Its totient is φ = 14064.

The previous prime is 28123. The next prime is 28151. The reversal of 28144 is 44182.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

28144 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (5456).

2²⁸¹⁴⁴ is an apocalyptic number.

It is an amenable number.

28144 is a deficient number, since it is larger than the sum of its proper divisors (26416).

28144 is a wasteful number, since it uses less digits than its factorization.

28144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1761 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

The square root of 28144 is about 167.7617358041. The cubic root of 28144 is about 30.4178565453.

It can be divided in two parts, 281 and 44, that added together give a triangular number (325 = T₂₅).

The spelling of 28144 in words is "twenty-eight thousand, one hundred forty-four".