999384 has 16 divisors (see below), whose sum is σ = 2498520. Its totient is φ = 333120.

The previous prime is 999377. The next prime is 999389. The reversal of 999384 is 483999.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999384.

It is not an unprimeable number, because it can be changed into a prime (999389) by changing a digit.

999384 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20797 + ... + 20844.

2⁹⁹⁹³⁸⁴ is an apocalyptic number.

It is an amenable number.

999384 is an abundant number, since it is smaller than the sum of its proper divisors (1499136).

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

999384 is a wasteful number, since it uses less digits than its factorization.

999384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41650 (or 41646 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 999384 is about 999.6919525534. The cubic root of 999384 is about 99.9794624490.

The spelling of 999384 in words is "nine hundred ninety-nine thousand, three hundred eighty-four".