431440404 has 12 divisors (see below), whose sum is σ = 1006694304. Its totient is φ = 143813464.

The previous prime is 431440381. The next prime is 431440411. The reversal of 431440404 is 404044134.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×431440404² = 372281644407366432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17976672 + ... + 17976695.

It is an arithmetic number, because the mean of its divisors is an integer number (83891192).

Almost surely, 2^431440404 is an apocalyptic number.

It is an amenable number.

431440404 is an abundant number, since it is smaller than the sum of its proper divisors (575253900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431440404 is a wasteful number, since it uses less digits than its factorization.

431440404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35953374 (or 35953372 counting only the distinct ones).

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

The square root of 431440404 is about 20771.1435409801. The cubic root of 431440404 is about 755.6260783493.

Adding to 431440404 its reverse (404044134), we get a palindrome (835484538).

The spelling of 431440404 in words is "four hundred thirty-one million, four hundred forty thousand, four hundred four".