28299 has 4 divisors (see below), whose sum is σ = 37736. Its totient is φ = 18864.

The previous prime is 28297. The next prime is 28307. The reversal of 28299 is 99282.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28299 - 2¹ = 28297 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28297) 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, 4714 + ... + 4719.

It is an arithmetic number, because the mean of its divisors is an integer number (9434).

2²⁸²⁹⁹ is an apocalyptic number.

28299 is a deficient number, since it is larger than the sum of its proper divisors (9437).

28299 is an equidigital number, since it uses as much as digits as its factorization.

28299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436.

The product of its digits is 2592, while the sum is 30.

The square root of 28299 is about 168.2230661949. The cubic root of 28299 is about 30.4735953504.

The spelling of 28299 in words is "twenty-eight thousand, two hundred ninety-nine".