12431040440 has 128 divisors (see below), whose sum is σ = 34475051520. Its totient is φ = 3928435200.

The previous prime is 12431040403. The next prime is 12431040463. The reversal of 12431040440 is 4404013421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2949935 + ... + 2954145.

It is an arithmetic number, because the mean of its divisors is an integer number (269336340).

Almost surely, 2^12431040440 is an apocalyptic number.

12431040440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12431040440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17237525760).

12431040440 is an abundant number, since it is smaller than the sum of its proper divisors (22044011080).

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

12431040440 is a wasteful number, since it uses less digits than its factorization.

12431040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053 (or 5049 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12431040440 its reverse (4404013421), we get a palindrome (16835053861).

The spelling of 12431040440 in words is "twelve billion, four hundred thirty-one million, forty thousand, four hundred forty".