404404431 has 8 divisors (see below), whose sum is σ = 539573040. Its totient is φ = 269419392.

The previous prime is 404404411. The next prime is 404404433. The reversal of 404404431 is 134404404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 404404431 - 2⁶ = 404404367 is a prime.

It is a super-2 number, since 2×404404431² = 327085887624867522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404404433) 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, 40666 + ... + 49623.

It is an arithmetic number, because the mean of its divisors is an integer number (67446630).

Almost surely, 2^404404431 is an apocalyptic number.

404404431 is a deficient number, since it is larger than the sum of its proper divisors (135168609).

404404431 is a wasteful number, since it uses less digits than its factorization.

404404431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91785.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 404404431 is about 20109.8093228156. The cubic root of 404404431 is about 739.5007778487.

Adding to 404404431 its reverse (134404404), we get a palindrome (538808835).

The spelling of 404404431 in words is "four hundred four million, four hundred four thousand, four hundred thirty-one".