13081744 has 40 divisors (see below), whose sum is σ = 27593720. Its totient is φ = 5971968.

The previous prime is 13081729. The next prime is 13081751. The reversal of 13081744 is 44718031.

It can be written as a sum of positive squares in 4 ways, for example, as 4787344 + 8294400 = 2188^2 + 2880^2 .

It is a super-2 number, since 2×13081744² = 342264052163072, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22384 + ... + 22960.

It is an arithmetic number, because the mean of its divisors is an integer number (689843).

Almost surely, 2^13081744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13081744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13796860).

13081744 is an abundant number, since it is smaller than the sum of its proper divisors (14511976).

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

13081744 is a wasteful number, since it uses less digits than its factorization.

13081744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 13081744 is about 3616.8693645195. The cubic root of 13081744 is about 235.6252791240.

Adding to 13081744 its reverse (44718031), we get a palindrome (57799775).

The spelling of 13081744 in words is "thirteen million, eighty-one thousand, seven hundred forty-four".