13540244 has 12 divisors (see below), whose sum is σ = 23784768. Its totient is φ = 6744600.

The previous prime is 13540237. The next prime is 13540249. The reversal of 13540244 is 44204531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13540249) 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, 5162 + ... + 7329.

It is an arithmetic number, because the mean of its divisors is an integer number (1982064).

Almost surely, 2^13540244 is an apocalyptic number.

It is an amenable number.

13540244 is a deficient number, since it is larger than the sum of its proper divisors (10244524).

13540244 is a wasteful number, since it uses less digits than its factorization.

13540244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12766 (or 12764 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 13540244 is about 3679.7070535574. The cubic root of 13540244 is about 238.3465281408.

Adding to 13540244 its reverse (44204531), we get a palindrome (57744775).

The spelling of 13540244 in words is "thirteen million, five hundred forty thousand, two hundred forty-four".