28186 has 8 divisors (see below), whose sum is σ = 44820. Its totient is φ = 13248.

The previous prime is 28183. The next prime is 28201. The reversal of 28186 is 68182.

It can be written as a sum of positive squares in 2 ways, for example, as 27225 + 961 = 165^2 + 31^2 .

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

It is a nialpdrome in base 13 and base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 28186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28181) 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, 381 + ... + 448.

2²⁸¹⁸⁶ is an apocalyptic number.

28186 is a deficient number, since it is larger than the sum of its proper divisors (16634).

28186 is a wasteful number, since it uses less digits than its factorization.

28186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848.

The product of its digits is 768, while the sum is 25.

The square root of 28186 is about 167.8868666692. The cubic root of 28186 is about 30.4329801358.

The spelling of 28186 in words is "twenty-eight thousand, one hundred eighty-six".