12432040440 has 64 divisors (see below), whose sum is σ = 37305446400. Its totient is φ = 3314381952.

The previous prime is 12432040433. The next prime is 12432040471. The reversal of 12432040440 is 4404023421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12432040440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 582681 + ... + 603639.

It is an arithmetic number, because the mean of its divisors is an integer number (582897600).

Almost surely, 2^12432040440 is an apocalyptic number.

12432040440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12432040440 is an abundant number, since it is smaller than the sum of its proper divisors (24873405960).

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

12432040440 is a wasteful number, since it uses less digits than its factorization.

12432040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25916 (or 25912 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 12432040440 its reverse (4404023421), we get a palindrome (16836063861).

The spelling of 12432040440 in words is "twelve billion, four hundred thirty-two million, forty thousand, four hundred forty".