28343 has 4 divisors (see below), whose sum is σ = 32400. Its totient is φ = 24288.

The previous prime is 28319. The next prime is 28349. The reversal of 28343 is 34382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34382 = 2 ⋅17191.

It is a cyclic number.

It is not a de Polignac number, because 28343 - 2⁶ = 28279 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28349) 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 in 3 ways as a sum of consecutive naturals, for example, 2018 + ... + 2031.

It is an arithmetic number, because the mean of its divisors is an integer number (8100).

2²⁸³⁴³ is an apocalyptic number.

28343 is a deficient number, since it is larger than the sum of its proper divisors (4057).

28343 is an equidigital number, since it uses as much as digits as its factorization.

28343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056.

The product of its digits is 576, while the sum is 20.

The square root of 28343 is about 168.3537941360. The cubic root of 28343 is about 30.4893808772.

It can be divided in two parts, 28 and 343, that multiplied together give a square (9604 = 98²).

The spelling of 28343 in words is "twenty-eight thousand, three hundred forty-three".