999999320 has 16 divisors (see below), whose sum is σ = 2249998560. Its totient is φ = 399999712.

The previous prime is 999999229. The next prime is 999999323. The reversal of 999999320 is 23999999.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999999320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12499952 + ... + 12500031.

It is an arithmetic number, because the mean of its divisors is an integer number (140624910).

Almost surely, 2^999999320 is an apocalyptic number.

It is an amenable number.

999999320 is an abundant number, since it is smaller than the sum of its proper divisors (1249999240).

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

999999320 is a wasteful number, since it uses less digits than its factorization.

999999320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24999994 (or 24999990 counting only the distinct ones).

The product of its (nonzero) digits is 3188646, while the sum is 59.

The square root of 999999320 is about 31622.7658499379. The cubic root of 999999320 is about 999.9997733333. Note that the first 3 decimals are identical.

The spelling of 999999320 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred twenty".