12440340424 has 32 divisors (see below), whose sum is σ = 24908371200. Its totient is φ = 5811946560.

The previous prime is 12440340413. The next prime is 12440340457. The reversal of 12440340424 is 42404304421.

It is a junction number, because it is equal to n+sod(n) for n = 12440340392 and 12440340401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857682 + ... + 872065.

It is an arithmetic number, because the mean of its divisors is an integer number (778386600).

Almost surely, 2^12440340424 is an apocalyptic number.

It is an amenable number.

12440340424 is an abundant number, since it is smaller than the sum of its proper divisors (12468030776).

12440340424 is a wasteful number, since it uses less digits than its factorization.

12440340424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729813 (or 1729809 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 12440340424 its reverse (42404304421), we get a palindrome (54844644845).

The spelling of 12440340424 in words is "twelve billion, four hundred forty million, three hundred forty thousand, four hundred twenty-four".