28118 has 8 divisors (see below), whose sum is σ = 44712. Its totient is φ = 13216.

The previous prime is 28111. The next prime is 28123. The reversal of 28118 is 81182.

28118 is nontrivially palindromic in base 16.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28111) by changing a digit.

28118 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, 380 + ... + 447.

It is an arithmetic number, because the mean of its divisors is an integer number (5589).

2²⁸¹¹⁸ is an apocalyptic number.

28118 is a deficient number, since it is larger than the sum of its proper divisors (16594).

28118 is a wasteful number, since it uses less digits than its factorization.

28118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846.

The product of its digits is 128, while the sum is 20.

The square root of 28118 is about 167.6842270460. The cubic root of 28118 is about 30.4084867810.

The spelling of 28118 in words is "twenty-eight thousand, one hundred eighteen".