It is a tau number, because it is divible by the number of its divisors (12).
It is a self number, because there is not a number n which added to its sum of digits gives 4000404.
It is a congruent number.
It is an unprimeable number.
Almost surely, 24000404 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.
4000404 is a wasteful number, since it uses less digits than its factorization.
4000404 is an evil number, because the sum of its binary digits is even.
The square root of 4000404 is about 2000.1009974499. The cubic root of 4000404 is about 158.7454492671.
Adding to 4000404 its reverse (4040004), we get a palindrome (8040408).
The spelling of 4000404 in words is "four million, four hundred four", and thus it is an aban number.