It is a nude number because it is divisible by every one of its digits.
It is a zygodrome in base 2.
It is a congruent number.
28728 is a Friedman number, since it can be written as (8+(8^2)^2)*7, using all its digits and the basic arithmetic operations.
228728 is an apocalyptic number.
28728 is a gapful number since it is divisible by the number (28) 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 28728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28728 is a wasteful number, since it uses less digits than its factorization.
28728 is an evil number, because the sum of its binary digits is even.
The square root of 28728 is about 169.4933627019. The cubic root of 28728 is about 30.6268123320.
The spelling of 28728 in words is "twenty-eight thousand, seven hundred twenty-eight".