28373 has 4 divisors (see below), whose sum is σ = 30060. Its totient is φ = 26688.

The previous prime is 28351. The next prime is 28387. The reversal of 28373 is 37382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37382 = 2 ⋅18691.

It can be written as a sum of positive squares in 2 ways, for example, as 18769 + 9604 = 137^2 + 98^2 .

It is a cyclic number.

It is not a de Polignac number, because 28373 - 2⁶ = 28309 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 (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, 818 + ... + 851.

It is an arithmetic number, because the mean of its divisors is an integer number (7515).

2²⁸³⁷³ is an apocalyptic number.

It is an amenable number.

28373 is a deficient number, since it is larger than the sum of its proper divisors (1687).

28373 is a wasteful number, since it uses less digits than its factorization.

28373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686.

The product of its digits is 1008, while the sum is 23.

The square root of 28373 is about 168.4428686528. The cubic root of 28373 is about 30.5001343719.

Subtracting 28373 from its reverse (37382), we obtain a palindrome (9009).

The spelling of 28373 in words is "twenty-eight thousand, three hundred seventy-three".