404434405 has 4 divisors (see below), whose sum is σ = 485321292. Its totient is φ = 323547520.

The previous prime is 404434379. The next prime is 404434441. The reversal of 404434405 is 504434404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 251095716 + 153338689 = 15846^2 + 12383^2 .

It is a de Polignac number, because none of the positive numbers 2^k-404434405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40443436 + ... + 40443445.

It is an arithmetic number, because the mean of its divisors is an integer number (121330323).

Almost surely, 2^404434405 is an apocalyptic number.

It is an amenable number.

404434405 is a deficient number, since it is larger than the sum of its proper divisors (80886887).

404434405 is an equidigital number, since it uses as much as digits as its factorization.

404434405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80886886.

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 404434405 is about 20110.5545671918. The cubic root of 404434405 is about 739.5190477184.

Adding to 404434405 its reverse (504434404), we get a palindrome (908868809).

Subtracting 404434405 from its reverse (504434404), we obtain a palindrome (99999999).

The spelling of 404434405 in words is "four hundred four million, four hundred thirty-four thousand, four hundred five".