405304 has 16 divisors (see below), whose sum is σ = 786600. Its totient is φ = 195552.

The previous prime is 405299. The next prime is 405323. The reversal of 405304 is 403504.

It is a congruent number.

It is an unprimeable number.

405304 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, 642 + ... + 1105.

2⁴⁰⁵³⁰⁴ is an apocalyptic number.

It is an amenable number.

405304 is a deficient number, since it is larger than the sum of its proper divisors (381296).

405304 is a wasteful number, since it uses less digits than its factorization.

405304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782 (or 1778 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 405304 is about 636.6349032216. The cubic root of 405304 is about 74.0048694142.

Adding to 405304 its reverse (403504), we get a palindrome (808808).

The spelling of 405304 in words is "four hundred five thousand, three hundred four".