It is a congruent number.
It is an unprimeable number.
Almost surely, 2999474456 is an apocalyptic number.
999474456 is the 16899-th nonagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 999474456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288330560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
999474456 is a wasteful number, since it uses less digits than its factorization.
999474456 is an evil number, because the sum of its binary digits is even.
The square root of 999474456 is about 31614.4659293811. The cubic root of 999474456 is about 999.8247879692.
The spelling of 999474456 in words is "nine hundred ninety-nine million, four hundred seventy-four thousand, four hundred fifty-six".