28333 has 4 divisors (see below), whose sum is σ = 29340. Its totient is φ = 27328.

The previous prime is 28319. The next prime is 28349. The reversal of 28333 is 33382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33382 = 2 ⋅16691.

It can be written as a sum of positive squares in 2 ways, for example, as 21609 + 6724 = 147^2 + 82^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28333 is a prime.

It is a Duffinian number.

28333 is a modest number, since divided by 333 gives 28 as remainder.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 28333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28393) 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, 460 + ... + 517.

It is an arithmetic number, because the mean of its divisors is an integer number (7335).

2²⁸³³³ is an apocalyptic number.

It is an amenable number.

28333 is a deficient number, since it is larger than the sum of its proper divisors (1007).

28333 is an equidigital number, since it uses as much as digits as its factorization.

28333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006.

The product of its digits is 432, while the sum is 19.

The square root of 28333 is about 168.3240921556. The cubic root of 28333 is about 30.4857946928.

It can be divided in two parts, 283 and 33, that multiplied together give a palindrome (9339).

The spelling of 28333 in words is "twenty-eight thousand, three hundred thirty-three".