431240 has 16 divisors (see below), whose sum is σ = 970380. Its totient is φ = 172480.

The previous prime is 431237. The next prime is 431251. The reversal of 431240 is 42134.

It can be written as a sum of positive squares in 2 ways, for example, as 417316 + 13924 = 646^2 + 118^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5351 + ... + 5430.

2⁴³¹²⁴⁰ is an apocalyptic number.

431240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431240 is an abundant number, since it is smaller than the sum of its proper divisors (539140).

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

431240 is a wasteful number, since it uses less digits than its factorization.

431240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10792 (or 10788 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 431240 is about 656.6886629142. The cubic root of 431240 is about 75.5509064165.

Adding to 431240 its reverse (42134), we get a palindrome (473374).

The spelling of 431240 in words is "four hundred thirty-one thousand, two hundred forty".