431132440 has 32 divisors (see below), whose sum is σ = 971167680. Its totient is φ = 172253952.

The previous prime is 431132417. The next prime is 431132441. The reversal of 431132440 is 44231134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431132441) 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, 31729 + ... + 43231.

It is an arithmetic number, because the mean of its divisors is an integer number (30348990).

Almost surely, 2^431132440 is an apocalyptic number.

431132440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431132440 is an abundant number, since it is smaller than the sum of its proper divisors (540035240).

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

431132440 is a wasteful number, since it uses less digits than its factorization.

431132440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12451 (or 12447 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 431132440 is about 20763.7289521897. The cubic root of 431132440 is about 755.4462458486.

Adding to 431132440 its reverse (44231134), we get a palindrome (475363574).

The spelling of 431132440 in words is "four hundred thirty-one million, one hundred thirty-two thousand, four hundred forty".