431240240 has 20 divisors (see below), whose sum is σ = 1002633744. Its totient is φ = 172496064.

The previous prime is 431240233. The next prime is 431240261. The reversal of 431240240 is 42042134.

431240240 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (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, 2695172 + ... + 2695331.

Almost surely, 2^431240240 is an apocalyptic number.

431240240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431240240 is an abundant number, since it is smaller than the sum of its proper divisors (571393504).

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

431240240 is a wasteful number, since it uses less digits than its factorization.

431240240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390516 (or 5390510 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 431240240 is about 20766.3246627804. The cubic root of 431240240 is about 755.5092043204.

Adding to 431240240 its reverse (42042134), we get a palindrome (473282374).

The spelling of 431240240 in words is "four hundred thirty-one million, two hundred forty thousand, two hundred forty".