12440232312 has 64 divisors (see below), whose sum is σ = 32188384800. Its totient is φ = 4001840640.

The previous prime is 12440232289. The next prime is 12440232319. The reversal of 12440232312 is 21323204421.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440232319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2556762 + ... + 2561622.

Almost surely, 2^12440232312 is an apocalyptic number.

12440232312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12440232312 is an abundant number, since it is smaller than the sum of its proper divisors (19748152488).

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

12440232312 is a wasteful number, since it uses less digits than its factorization.

12440232312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8576 (or 8572 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 12440232312 its reverse (21323204421), we get a palindrome (33763436733).

The spelling of 12440232312 in words is "twelve billion, four hundred forty million, two hundred thirty-two thousand, three hundred twelve".