It is a happy number.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a plaindrome in base 6.
It is a nialpdrome in base 8.
It is a zygodrome in base 6.
It is a congruent number.
228000 is an apocalyptic number.
28000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 28000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39312).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28000 is an equidigital number, since it uses as much as digits as its factorization.
28000 is an odious number, because the sum of its binary digits is odd.
The square root of 28000 is about 167.3320053068. The cubic root of 28000 is about 30.3658897188.
Adding to 28000 its reverse (82), we get a palindrome (28082).
The spelling of 28000 in words is "twenty-eight thousand".