It is a congruent number.
2784320 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 784320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
784320 is a wasteful number, since it uses less digits than its factorization.
784320 is an evil number, because the sum of its binary digits is even.
The square root of 784320 is about 885.6184279926. The cubic root of 784320 is about 92.2212695396.
The spelling of 784320 in words is "seven hundred eighty-four thousand, three hundred twenty".