12340230440 has 32 divisors (see below), whose sum is σ = 27770786280. Its totient is φ = 4935155712.

The previous prime is 12340230437. The next prime is 12340230443. The reversal of 12340230440 is 4403204321.

It is an interprime number because it is at equal distance from previous prime (12340230437) and next prime (12340230443).

It can be written as a sum of positive squares in 4 ways, for example, as 11685177604 + 655052836 = 108098^2 + 25594^2 .

It is not an unprimeable number, because it can be changed into a prime (12340230443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207944 + ... + 260616.

Almost surely, 2^12340230440 is an apocalyptic number.

12340230440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12340230440 is an abundant number, since it is smaller than the sum of its proper divisors (15430555840).

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

12340230440 is a wasteful number, since it uses less digits than its factorization.

12340230440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58541 (or 58537 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 12340230440 its reverse (4403204321), we get a palindrome (16743434761).

The spelling of 12340230440 in words is "twelve billion, three hundred forty million, two hundred thirty thousand, four hundred forty".