28322 has 18 divisors (see below), whose sum is σ = 52497. Its totient is φ = 11424.

The previous prime is 28319. The next prime is 28349. The reversal of 28322 is 22382.

It can be written as a sum of positive squares in 2 ways, for example, as 25921 + 2401 = 161^2 + 49^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119.

It is a hoax number, since the sum of its digits (17) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28322.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28322.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1658 + ... + 1674.

28322 is a Friedman number, since it can be written as 238^2/2, using all its digits and the basic arithmetic operations.

2²⁸³²² is an apocalyptic number.

28322 is a deficient number, since it is larger than the sum of its proper divisors (24175).

28322 is a wasteful number, since it uses less digits than its factorization.

28322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 26 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 28322 is about 168.2914139224. The cubic root of 28322 is about 30.4818489152.

It can be divided in two parts, 283 and 22, that multiplied together give a palindrome (6226).

The spelling of 28322 in words is "twenty-eight thousand, three hundred twenty-two".