It is a congruent number.
It is an unprimeable number.
Almost surely, 21002004404 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 1002004404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1239398160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1002004404 is a wasteful number, since it uses less digits than its factorization.
1002004404 is an evil number, because the sum of its binary digits is even.
The square root of 1002004404 is about 31654.4531464374. The cubic root of 1002004404 is about 1000.6676887592.
Adding to 1002004404 its reverse (4044002001), we get a palindrome (5046006405).
The spelling of 1002004404 in words is "one billion, two million, four thousand, four hundred four".