12404312440 has 64 divisors (see below), whose sum is σ = 30236794560. Its totient is φ = 4552596480.

The previous prime is 12404312411. The next prime is 12404312447. The reversal of 12404312440 is 4421340421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12404312447) 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, 15420 + ... + 158260.

It is an arithmetic number, because the mean of its divisors is an integer number (472449915).

Almost surely, 2^12404312440 is an apocalyptic number.

12404312440 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 12404312440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15118397280).

12404312440 is an abundant number, since it is smaller than the sum of its proper divisors (17832482120).

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

12404312440 is a wasteful number, since it uses less digits than its factorization.

12404312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143032 (or 143028 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 12404312440 its reverse (4421340421), we get a palindrome (16825652861).

The spelling of 12404312440 in words is "twelve billion, four hundred four million, three hundred twelve thousand, four hundred forty".