It is an unprimeable number.
Almost surely, 2999916840 is an apocalyptic number.
999916840 is the 14907-th centered nonagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 999916840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251391680).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
999916840 is a wasteful number, since it uses less digits than its factorization.
999916840 is an evil number, because the sum of its binary digits is even.
The square root of 999916840 is about 31621.4616992953. The cubic root of 999916840 is about 999.9722792316.
The spelling of 999916840 in words is "nine hundred ninety-nine million, nine hundred sixteen thousand, eight hundred forty".