Subtracting from 28784 its product of digits (3584), we obtain a triangular number (25200 = T224).
28784 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.
It is a nude number because it is divisible by every one of its digits.
28784 is an undulating number in base 16.
It is a zygodrome in base 2.
It is a congruent number.
28784 is a Friedman number, since it can be written as 7*(8^4+8*2), using all its digits and the basic arithmetic operations.
228784 is an apocalyptic number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28784 is a wasteful number, since it uses less digits than its factorization.
28784 is an evil number, because the sum of its binary digits is even.
The square root of 28784 is about 169.6584804836. The cubic root of 28784 is about 30.6466998781.
The spelling of 28784 in words is "twenty-eight thousand, seven hundred eighty-four".