28279 has 2 divisors, whose sum is σ = 28280. Its totient is φ = 28278.

The previous prime is 28277. The next prime is 28283. The reversal of 28279 is 97282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28279 - 2¹ = 28277 is a prime.

Together with 28277, it forms a pair of twin primes.

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14139 + 14140.

It is an arithmetic number, because the mean of its divisors is an integer number (14140).

2²⁸²⁷⁹ is an apocalyptic number.

28279 is a deficient number, since it is larger than the sum of its proper divisors (1).

28279 is an equidigital number, since it uses as much as digits as its factorization.

28279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 28279 is about 168.1636108080. The cubic root of 28279 is about 30.4664147016.

It can be divided in two parts, 282 and 79, that added together give a square (361 = 19²).

The spelling of 28279 in words is "twenty-eight thousand, two hundred seventy-nine".