999328 has 48 divisors (see below), whose sum is σ = 2286144. Its totient is φ = 424960.

The previous prime is 999307. The next prime is 999329. The reversal of 999328 is 823999.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (999329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5901 + ... + 6067.

It is an arithmetic number, because the mean of its divisors is an integer number (47628).

2⁹⁹⁹³²⁸ 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 999328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1143072).

999328 is an abundant number, since it is smaller than the sum of its proper divisors (1286816).

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

999328 is a wasteful number, since it uses less digits than its factorization.

999328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 197 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The square root of 999328 is about 999.6639435330. The cubic root of 999328 is about 99.9775949805.

The spelling of 999328 in words is "nine hundred ninety-nine thousand, three hundred twenty-eight".