Multipling 802816 by its sum of digits (25), we get a square (20070400 = 44802).
The square root of 802816 is 896.
It is a nialpdrome in base 16.
802816 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
802816 is a Friedman number, since it can be written as (810+86)^2, using all its digits and the basic arithmetic operations.
2802816 is an apocalyptic number.
802816 is the 896-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 802816
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
802816 is an frugal number, since it uses more digits than its factorization.
802816 is an odious number, because the sum of its binary digits is odd.
The cubic root of 802816 is about 92.9405717370.
The spelling of 802816 in words is "eight hundred two thousand, eight hundred sixteen".