999344320 has 168 divisors, whose sum is σ = 2730910464. Its totient is φ = 346963968.

The previous prime is 999344299. The next prime is 999344393. The reversal of 999344320 is 23443999.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 918817 + ... + 919903.

Almost surely, 2^999344320 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 999344320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1365455232).

999344320 is an abundant number, since it is smaller than the sum of its proper divisors (1731566144).

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

999344320 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (999344319) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (1147).

999344320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 999344320 is about 31612.4076906521. The cubic root of 999344320 is about 999.7813922141.

The spelling of 999344320 in words is "nine hundred ninety-nine million, three hundred forty-four thousand, three hundred twenty".