431332240 has 20 divisors (see below), whose sum is σ = 1002847644. Its totient is φ = 172532864.

The previous prime is 431332229. The next prime is 431332261. The reversal of 431332240 is 42233134.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 193432464 + 237899776 = 13908^2 + 15424^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2695747 + ... + 2695906.

Almost surely, 2^431332240 is an apocalyptic number.

431332240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431332240 is an abundant number, since it is smaller than the sum of its proper divisors (571515404).

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

431332240 is a wasteful number, since it uses less digits than its factorization.

431332240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5391666 (or 5391660 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 431332240 is about 20768.5396694134. The cubic root of 431332240 is about 755.5629268152.

Adding to 431332240 its reverse (42233134), we get a palindrome (473565374).

The spelling of 431332240 in words is "four hundred thirty-one million, three hundred thirty-two thousand, two hundred forty".