999675864 has 192 divisors, whose sum is σ = 3186892800. Its totient is φ = 289586880.

The previous prime is 999675863. The next prime is 999675883. The reversal of 999675864 is 468576999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999675863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 600297 + ... + 601959.

It is an arithmetic number, because the mean of its divisors is an integer number (16598400).

Almost surely, 2^999675864 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 999675864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1593446400).

999675864 is an abundant number, since it is smaller than the sum of its proper divisors (2187216936).

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

999675864 is a wasteful number, since it uses less digits than its factorization.

999675864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723 (or 1702 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The square root of 999675864 is about 31617.6511461557. The cubic root of 999675864 is about 999.8919429908.

The spelling of 999675864 in words is "nine hundred ninety-nine million, six hundred seventy-five thousand, eight hundred sixty-four".