323904 has 56 divisors (see below), whose sum is σ = 983488. Its totient is φ = 92160.

The previous prime is 323903. The next prime is 323923. The reversal of 323904 is 409323.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (21).

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 323904.

It is not an unprimeable number, because it can be changed into a prime (323903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1224 + ... + 1464.

2³²³⁹⁰⁴ 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 323904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491744).

323904 is an abundant number, since it is smaller than the sum of its proper divisors (659584).

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

323904 is a wasteful number, since it uses less digits than its factorization.

323904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 323904 is about 569.1256451786. The cubic root of 323904 is about 68.6760703913.

The spelling of 323904 in words is "three hundred twenty-three thousand, nine hundred four".