404432 has 40 divisors (see below), whose sum is σ = 940416. Its totient is φ = 164736.

The previous prime is 404431. The next prime is 404449. The reversal of 404432 is 234404.

It is a self number, because there is not a number n which added to its sum of digits gives 404432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404431) 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, 2498 + ... + 2654.

2⁴⁰⁴⁴³² 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 404432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470208).

404432 is an abundant number, since it is smaller than the sum of its proper divisors (535984).

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

404432 is a wasteful number, since it uses less digits than its factorization.

404432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 404432 is about 635.9496835442. The cubic root of 404432 is about 73.9517581847.

Adding to 404432 its reverse (234404), we get a palindrome (638836).

The spelling of 404432 in words is "four hundred four thousand, four hundred thirty-two".