13044323440 has 20 divisors (see below), whose sum is σ = 30328052184. Its totient is φ = 5217729344.

The previous prime is 13044323423. The next prime is 13044323443. The reversal of 13044323440 is 4432344031.

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

It is a junction number, because it is equal to n+sod(n) for n = 13044323399 and 13044323408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13044323443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81526942 + ... + 81527101.

Almost surely, 2^13044323440 is an apocalyptic number.

13044323440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13044323440 is an abundant number, since it is smaller than the sum of its proper divisors (17283728744).

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

13044323440 is a wasteful number, since it uses less digits than its factorization.

13044323440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163054056 (or 163054050 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 13044323440 its reverse (4432344031), we get a palindrome (17476667471).

The spelling of 13044323440 in words is "thirteen billion, forty-four million, three hundred twenty-three thousand, four hundred forty".