13081444 has 12 divisors (see below), whose sum is σ = 23030784. Its totient is φ = 6501224.

The previous prime is 13081433. The next prime is 13081447. The reversal of 13081444 is 44418031.

It is a super-2 number, since 2×13081444² = 342248354250272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13081447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9124 + ... + 10459.

It is an arithmetic number, because the mean of its divisors is an integer number (1919232).

Almost surely, 2^13081444 is an apocalyptic number.

It is an amenable number.

13081444 is a deficient number, since it is larger than the sum of its proper divisors (9949340).

13081444 is a wasteful number, since it uses less digits than its factorization.

13081444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19754 (or 19752 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 13081444 is about 3616.8278919517. The cubic root of 13081444 is about 235.6234779339.

Adding to 13081444 its reverse (44418031), we get a palindrome (57499475).

The spelling of 13081444 in words is "thirteen million, eighty-one thousand, four hundred forty-four".