404432231 has 24 divisors (see below), whose sum is σ = 502439040. Its totient is φ = 323870400.

The previous prime is 404432219. The next prime is 404432263. The reversal of 404432231 is 132234404.

It is a de Polignac number, because none of the positive numbers 2^k-404432231 is a prime.

It is a super-2 number, since 2×404432231² = 327130858943274722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404432197 and 404432206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404432201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39461 + ... + 48641.

It is an arithmetic number, because the mean of its divisors is an integer number (20934960).

Almost surely, 2^404432231 is an apocalyptic number.

404432231 is a deficient number, since it is larger than the sum of its proper divisors (98006809).

404432231 is a wasteful number, since it uses less digits than its factorization.

404432231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9255 (or 9248 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 404432231 is about 20110.5005158996. The cubic root of 404432231 is about 739.5177226438.

Adding to 404432231 its reverse (132234404), we get a palindrome (536666635).

The spelling of 404432231 in words is "four hundred four million, four hundred thirty-two thousand, two hundred thirty-one".