28119 has 16 divisors (see below), whose sum is σ = 46592. Its totient is φ = 14688.

The previous prime is 28111. The next prime is 28123. The reversal of 28119 is 91182.

It is not a de Polignac number, because 28119 - 2³ = 28111 is a prime.

It is a super-2 number, since 2×28119² = 1581356322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

28119 is a lucky number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 28095 and 28104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28111) 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 in 15 ways as a sum of consecutive naturals, for example, 222 + ... + 324.

It is an arithmetic number, because the mean of its divisors is an integer number (2912).

2²⁸¹¹⁹ is an apocalyptic number.

28119 is a deficient number, since it is larger than the sum of its proper divisors (18473).

28119 is a wasteful number, since it uses less digits than its factorization.

28119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126.

The product of its digits is 144, while the sum is 21.

The square root of 28119 is about 167.6872088145. The cubic root of 28119 is about 30.4088472634.

It can be divided in two parts, 281 and 19, that added together give a triangular number (300 = T₂₄).

The spelling of 28119 in words is "twenty-eight thousand, one hundred nineteen".