12431330440 has 16 divisors (see below), whose sum is σ = 27970493580. Its totient is φ = 4972532160.

The previous prime is 12431330383. The next prime is 12431330441. The reversal of 12431330440 is 4403313421.

It can be written as a sum of positive squares in 2 ways, for example, as 10249132644 + 2182197796 = 101238^2 + 46714^2 .

It is a super-3 number, since 3×12431330440³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12431330441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155391591 + ... + 155391670.

Almost surely, 2^12431330440 is an apocalyptic number.

12431330440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12431330440 is an abundant number, since it is smaller than the sum of its proper divisors (15539163140).

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

12431330440 is a wasteful number, since it uses less digits than its factorization.

12431330440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310783272 (or 310783268 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 12431330440 its reverse (4403313421), we get a palindrome (16834643861).

The spelling of 12431330440 in words is "twelve billion, four hundred thirty-one million, three hundred thirty thousand, four hundred forty".