28102 has 4 divisors (see below), whose sum is σ = 42156. Its totient is φ = 14050.

The previous prime is 28099. The next prime is 28109. The reversal of 28102 is 20182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20182 = 2 ⋅10091.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7024 + ... + 7027.

It is an arithmetic number, because the mean of its divisors is an integer number (10539).

2²⁸¹⁰² is an apocalyptic number.

28102 is a deficient number, since it is larger than the sum of its proper divisors (14054).

28102 is a wasteful number, since it uses less digits than its factorization.

28102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14053.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 28102 is about 167.6365115361. The cubic root of 28102 is about 30.4027179010.

Adding to 28102 its reverse (20182), we get a palindrome (48284).

The spelling of 28102 in words is "twenty-eight thousand, one hundred two".