423804 has 12 divisors (see below), whose sum is σ = 988904. Its totient is φ = 141264.

The previous prime is 423803. The next prime is 423823. The reversal of 423804 is 408324.

It is a happy number.

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

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17647 + ... + 17670.

2⁴²³⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

423804 is an abundant number, since it is smaller than the sum of its proper divisors (565100).

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

423804 is a wasteful number, since it uses less digits than its factorization.

423804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35324 (or 35322 counting only the distinct ones).

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

The square root of 423804 is about 651.0023041434. The cubic root of 423804 is about 75.1141373253.

The spelling of 423804 in words is "four hundred twenty-three thousand, eight hundred four".