It is a congruent number.
It is an unprimeable number.
404736 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2404736 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 404736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588672).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
404736 is a wasteful number, since it uses less digits than its factorization.
404736 is an evil number, because the sum of its binary digits is even.
The square root of 404736 is about 636.1886512663. The cubic root of 404736 is about 73.9702826865.
The spelling of 404736 in words is "four hundred four thousand, seven hundred thirty-six".