13040044240 has 20 divisors (see below), whose sum is σ = 30318103044. Its totient is φ = 5216017664.

The previous prime is 13040044207. The next prime is 13040044243. The reversal of 13040044240 is 4244004031.

It can be written as a sum of positive squares in 2 ways, for example, as 1917388944 + 11122655296 = 43788^2 + 105464^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13040044243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81500197 + ... + 81500356.

Almost surely, 2^13040044240 is an apocalyptic number.

13040044240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13040044240 is an abundant number, since it is smaller than the sum of its proper divisors (17278058804).

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

13040044240 is a wasteful number, since it uses less digits than its factorization.

13040044240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163000566 (or 163000560 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 13040044240 its reverse (4244004031), we get a palindrome (17284048271).

The spelling of 13040044240 in words is "thirteen billion, forty million, forty-four thousand, two hundred forty".