28286 has 4 divisors (see below), whose sum is σ = 42432. Its totient is φ = 14142.

The previous prime is 28283. The next prime is 28289. The reversal of 28286 is 68282.

28286 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68282 = 2 ⋅34141.

It is an interprime number because it is at equal distance from previous prime (28283) and next prime (28289).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7070 + ... + 7073.

It is an arithmetic number, because the mean of its divisors is an integer number (10608).

2²⁸²⁸⁶ is an apocalyptic number.

28286 is a deficient number, since it is larger than the sum of its proper divisors (14146).

28286 is a wasteful number, since it uses less digits than its factorization.

28286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14145.

The product of its digits is 1536, while the sum is 26.

The square root of 28286 is about 168.1844225843. The cubic root of 28286 is about 30.4689283137.

It can be divided in two parts, 28 and 286, that multiplied together give a palindrome (8008).

The spelling of 28286 in words is "twenty-eight thousand, two hundred eighty-six".