It is a nialpdrome in base 4, base 14 and base 16.
It is a Kaprekar number, because its square (7441984) can be partitioned into two parts whose sum is 2728.
22728 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2880).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2728 is a wasteful number, since it uses less digits than its factorization.
2728 is an odious number, because the sum of its binary digits is odd.
The square root of 2728 is about 52.2302594288. The cubic root of 2728 is about 13.9727360556.
The spelling of 2728 in words is "two thousand, seven hundred twenty-eight".