12342400040 has 16 divisors (see below), whose sum is σ = 27770400180. Its totient is φ = 4936960000.

The previous prime is 12342400013. The next prime is 12342400051. The reversal of 12342400040 is 4000424321.

It can be written as a sum of positive squares in 2 ways, for example, as 12045940516 + 296459524 = 109754^2 + 17218^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12342399985 and 12342400021.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154279961 + ... + 154280040.

Almost surely, 2^12342400040 is an apocalyptic number.

12342400040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12342400040 is an abundant number, since it is smaller than the sum of its proper divisors (15428000140).

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

12342400040 is a wasteful number, since it uses less digits than its factorization.

12342400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308560012 (or 308560008 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 12342400040 its reverse (4000424321), we get a palindrome (16342824361).

The spelling of 12342400040 in words is "twelve billion, three hundred forty-two million, four hundred thousand, forty".