28922 has 4 divisors (see below), whose sum is σ = 43386. Its totient is φ = 14460.

The previous prime is 28921. The next prime is 28927. The reversal of 28922 is 22982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22982 = 2 ⋅11491.

It can be written as a sum of positive squares in only one way, i.e., 28561 + 361 = 169^2 + 19^2 .

It is an Ulam number.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28922.

It is not an unprimeable number, because it can be changed into a prime (28921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7229 + ... + 7232.

2²⁸⁹²² is an apocalyptic number.

28922 is a deficient number, since it is larger than the sum of its proper divisors (14464).

28922 is a wasteful number, since it uses less digits than its factorization.

28922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14463.

The product of its digits is 576, while the sum is 23.

The square root of 28922 is about 170.0646935728. The cubic root of 28922 is about 30.6955986150.

The spelling of 28922 in words is "twenty-eight thousand, nine hundred twenty-two".