28303 has 8 divisors (see below), whose sum is σ = 32256. Its totient is φ = 24600.

The previous prime is 28297. The next prime is 28307. The reversal of 28303 is 30382.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28303 - 2⁹ = 27791 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 (28307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300 + ... + 382.

It is an arithmetic number, because the mean of its divisors is an integer number (4032).

2²⁸³⁰³ is an apocalyptic number.

28303 is a deficient number, since it is larger than the sum of its proper divisors (3953).

28303 is a wasteful number, since it uses less digits than its factorization.

28303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 28303 is about 168.2349547508. The cubic root of 28303 is about 30.4750310741.

Adding to 28303 its reverse (30382), we get a palindrome (58685).

The spelling of 28303 in words is "twenty-eight thousand, three hundred three".