28339 has 4 divisors (see below), whose sum is σ = 30024. Its totient is φ = 26656.

The previous prime is 28319. The next prime is 28349. The reversal of 28339 is 93382.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93382 = 2 ⋅46691.

It is not a de Polignac number, because 28339 - 2⁵ = 28307 is a prime.

It is a Duffinian number.

28339 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (28309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817 + ... + 850.

It is an arithmetic number, because the mean of its divisors is an integer number (7506).

2²⁸³³⁹ is an apocalyptic number.

28339 is a deficient number, since it is larger than the sum of its proper divisors (1685).

28339 is a wasteful number, since it uses less digits than its factorization.

28339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684.

The product of its digits is 1296, while the sum is 25.

The square root of 28339 is about 168.3419139727. The cubic root of 28339 is about 30.4879465047.

The spelling of 28339 in words is "twenty-eight thousand, three hundred thirty-nine".