999820068 has 48 divisors (see below), whose sum is σ = 2580285120. Its totient is φ = 299320704.

The previous prime is 999819943. The next prime is 999820069. The reversal of 999820068 is 860028999.

It is a self number, because there is not a number n which added to its sum of digits gives 999820068.

It is not an unprimeable number, because it can be changed into a prime (999820069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80838 + ... + 92381.

It is an arithmetic number, because the mean of its divisors is an integer number (53755940).

Almost surely, 2^999820068 is an apocalyptic number.

It is an amenable number.

999820068 is an abundant number, since it is smaller than the sum of its proper divisors (1580465052).

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

999820068 is a wasteful number, since it uses less digits than its factorization.

999820068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173276 (or 173274 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 999820068 is about 31619.9314989770. The cubic root of 999820068 is about 999.9400190690.

The spelling of 999820068 in words is "nine hundred ninety-nine million, eight hundred twenty thousand, sixty-eight".