999872016 has 320 divisors, whose sum is σ = 3242459136. Its totient is φ = 261273600.

The previous prime is 999872009. The next prime is 999872057. The reversal of 999872016 is 610278999.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 999872016.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7872945 + ... + 7873071.

Almost surely, 2^999872016 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 999872016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621229568).

999872016 is an abundant number, since it is smaller than the sum of its proper divisors (2242587120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999872016 is a wasteful number, since it uses less digits than its factorization.

999872016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 999872016 is about 31620.7529322121. The cubic root of 999872016 is about 999.9573368465.

The spelling of 999872016 in words is "nine hundred ninety-nine million, eight hundred seventy-two thousand, sixteen".