13400343440 has 120 divisors (see below), whose sum is σ = 34308637440. Its totient is φ = 4863893760.

The previous prime is 13400343361. The next prime is 13400343493. The reversal of 13400343440 is 4434300431.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7617281 + ... + 7619039.

It is an arithmetic number, because the mean of its divisors is an integer number (285905312).

Almost surely, 2^13400343440 is an apocalyptic number.

13400343440 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 13400343440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17154318720).

13400343440 is an abundant number, since it is smaller than the sum of its proper divisors (20908294000).

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

13400343440 is a wasteful number, since it uses less digits than its factorization.

13400343440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 13400343440 its reverse (4434300431), we get a palindrome (17834643871).

The spelling of 13400343440 in words is "thirteen billion, four hundred million, three hundred forty-three thousand, four hundred forty".