28168 has 16 divisors (see below), whose sum is σ = 60480. Its totient is φ = 12048.

The previous prime is 28163. The next prime is 28181. The reversal of 28168 is 86182.

It is not an unprimeable number, because it can be changed into a prime (28163) by changing a digit.

28168 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196 + ... + 307.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

2²⁸¹⁶⁸ is an apocalyptic number.

28168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28168 is an abundant number, since it is smaller than the sum of its proper divisors (32312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30240).

28168 is a wasteful number, since it uses less digits than its factorization.

28168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 512 counting only the distinct ones).

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

The square root of 28168 is about 167.8332505793. The cubic root of 28168 is about 30.4265004379.

It can be divided in two parts, 28 and 168, that added together give a square (196 = 14²).

The spelling of 28168 in words is "twenty-eight thousand, one hundred sixty-eight".