28203 has 16 divisors (see below), whose sum is σ = 46080. Its totient is φ = 14976.

The previous prime is 28201. The next prime is 28211. The reversal of 28203 is 30282.

28203 is a nontrivial binomial coefficient, being equal to C(238, 2).

It is not a de Polignac number, because 28203 - 2¹ = 28201 is a prime.

28203 is a lucky number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (28201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318 + ... + 396.

It is an arithmetic number, because the mean of its divisors is an integer number (2880).

2²⁸²⁰³ is an apocalyptic number.

28203 is the 237-th triangular number and also the 119-th hexagonal number.

28203 is a deficient number, since it is larger than the sum of its proper divisors (17877).

28203 is a wasteful number, since it uses less digits than its factorization.

28203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 28203 is about 167.9374883699. The cubic root of 28203 is about 30.4390973179.

Adding to 28203 its reverse (30282), we get a palindrome (58485).

It can be divided in two parts, 28 and 203, that added together give a triangular number (231 = T₂₁).

The spelling of 28203 in words is "twenty-eight thousand, two hundred three".