28026 has 20 divisors (see below), whose sum is σ = 63162. Its totient is φ = 9288.

The previous prime is 28019. The next prime is 28027. The reversal of 28026 is 62082.

It can be written as a sum of positive squares in only one way, i.e., 18225 + 9801 = 135^2 + 99^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28027) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76 + ... + 248.

2²⁸⁰²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31581).

28026 is an abundant number, since it is smaller than the sum of its proper divisors (35136).

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

28026 is a wasteful number, since it uses less digits than its factorization.

28026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 28026 is about 167.4096771396. The cubic root of 28026 is about 30.3752857769.

The spelling of 28026 in words is "twenty-eight thousand, twenty-six".