13440043008 has 432 divisors, whose sum is σ = 47190911040. Its totient is φ = 3667378176.

The previous prime is 13440042949. The next prime is 13440043009. The reversal of 13440043008 is 80034004431.

It is not an unprimeable number, because it can be changed into a prime (13440043009) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20772541 + ... + 20773187.

It is an arithmetic number, because the mean of its divisors is an integer number (109238220).

Almost surely, 2^13440043008 is an apocalyptic number.

13440043008 is a gapful number since it is divisible by the number (18) 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 13440043008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23595455520).

13440043008 is an abundant number, since it is smaller than the sum of its proper divisors (33750868032).

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

13440043008 is a wasteful number, since it uses less digits than its factorization.

13440043008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 13440043008 its reverse (80034004431), we get a palindrome (93474047439).

The spelling of 13440043008 in words is "thirteen billion, four hundred forty million, forty-three thousand, eight".