28108 has 6 divisors (see below), whose sum is σ = 49196. Its totient is φ = 14052.

The previous prime is 28099. The next prime is 28109. The reversal of 28108 is 80182.

It is a happy number.

28108 is a modest number, since divided by 108 gives 28 as remainder.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (28109) by changing a digit.

28108 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 as a sum of consecutive naturals, namely, 3510 + ... + 3517.

2²⁸¹⁰⁸ is an apocalyptic number.

It is an amenable number.

28108 is a deficient number, since it is larger than the sum of its proper divisors (21088).

28108 is a wasteful number, since it uses less digits than its factorization.

28108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7031 (or 7029 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 28108 is about 167.6544064437. The cubic root of 28108 is about 30.4048814876.

It can be divided in two parts, 28 and 108, that added together give a triangular number (136 = T₁₆).

The spelling of 28108 in words is "twenty-eight thousand, one hundred eight".