404405234 has 32 divisors (see below), whose sum is σ = 660225600. Its totient is φ = 185163840.

The previous prime is 404405207. The next prime is 404405237. The reversal of 404405234 is 432504404.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (404405237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135284 + ... + 138240.

It is an arithmetic number, because the mean of its divisors is an integer number (20632050).

Almost surely, 2^404405234 is an apocalyptic number.

404405234 is a deficient number, since it is larger than the sum of its proper divisors (255820366).

404405234 is a wasteful number, since it uses less digits than its factorization.

404405234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098.

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 404405234 is about 20109.8292881864. The cubic root of 404405234 is about 739.5012673082.

Adding to 404405234 its reverse (432504404), we get a palindrome (836909638).

The spelling of 404405234 in words is "four hundred four million, four hundred five thousand, two hundred thirty-four".