404431431 has 16 divisors (see below), whose sum is σ = 545923584. Its totient is φ = 266295744.

The previous prime is 404431429. The next prime is 404431441. The reversal of 404431431 is 134134404.

It is not a de Polignac number, because 404431431 - 2¹ = 404431429 is a prime.

It is a super-2 number, since 2×404431431² = 327129564761415522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404431441) 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, 116091 + ... + 119523.

It is an arithmetic number, because the mean of its divisors is an integer number (34120224).

Almost surely, 2^404431431 is an apocalyptic number.

404431431 is a deficient number, since it is larger than the sum of its proper divisors (141492153).

404431431 is a wasteful number, since it uses less digits than its factorization.

404431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 404431431 is about 20110.4806257832. The cubic root of 404431431 is about 739.5172350346.

Adding to 404431431 its reverse (134134404), we get a palindrome (538565835).

The spelling of 404431431 in words is "four hundred four million, four hundred thirty-one thousand, four hundred thirty-one".