431444240 has 20 divisors (see below), whose sum is σ = 1003108044. Its totient is φ = 172577664.

The previous prime is 431444227. The next prime is 431444257. The reversal of 431444240 is 42444134.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 339591184 + 91853056 = 18428^2 + 9584^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×431444240² = 372288264458355200, which contains 22 as substring.

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, 2696447 + ... + 2696606.

Almost surely, 2^431444240 is an apocalyptic number.

431444240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431444240 is an abundant number, since it is smaller than the sum of its proper divisors (571663804).

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

431444240 is a wasteful number, since it uses less digits than its factorization.

431444240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5393066 (or 5393060 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 431444240 is about 20771.2358804189. The cubic root of 431444240 is about 755.6283178035.

Adding to 431444240 its reverse (42444134), we get a palindrome (473888374).

The spelling of 431444240 in words is "four hundred thirty-one million, four hundred forty-four thousand, two hundred forty".