328404 has 12 divisors (see below), whose sum is σ = 766304. Its totient is φ = 109464.

The previous prime is 328397. The next prime is 328411. The reversal of 328404 is 404823.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (328397) and next prime (328411).

It is a tau number, because it is divible by the number of its divisors (12).

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 328404.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13672 + ... + 13695.

2³²⁸⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

328404 is an abundant number, since it is smaller than the sum of its proper divisors (437900).

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

328404 is a wasteful number, since it uses less digits than its factorization.

328404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27374 (or 27372 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 328404 is about 573.0654412892. The cubic root of 328404 is about 68.9926478199.

The spelling of 328404 in words is "three hundred twenty-eight thousand, four hundred four".