28273 has 6 divisors (see below), whose sum is σ = 32946. Its totient is φ = 24192.

The previous prime is 28229. The next prime is 28277. The reversal of 28273 is 37282.

It is a happy number.

28273 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in only one way, i.e., 28224 + 49 = 168^2 + 7^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240 + ... + 337.

It is an arithmetic number, because the mean of its divisors is an integer number (5491).

2²⁸²⁷³ is an apocalyptic number.

It is an amenable number.

28273 is a deficient number, since it is larger than the sum of its proper divisors (4673).

28273 is an equidigital number, since it uses as much as digits as its factorization.

28273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 584 counting only the distinct ones).

The product of its digits is 672, while the sum is 22.

The square root of 28273 is about 168.1457700925. The cubic root of 28273 is about 30.4642598468.

Subtracting 28273 from its reverse (37282), we obtain a palindrome (9009).

The spelling of 28273 in words is "twenty-eight thousand, two hundred seventy-three".