It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28247.
228247 is an apocalyptic number.
28247 is an equidigital number, since it uses as much as digits as its factorization.
28247 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 648.
The square root of 28247 is about 168.0684384410. The cubic root of 28247 is about 30.4549186181.
Subtracting from 28247 its sum of digits (23), we obtain a square (28224 = 1682).
The spelling of 28247 in words is "twenty-eight thousand, two hundred forty-seven".