13281338 has 16 divisors (see below), whose sum is σ = 22814784. Its totient is φ = 5680320.

The previous prime is 13281329. The next prime is 13281371. The reversal of 13281338 is 83318231.

It is a self number, because there is not a number n which added to its sum of digits gives 13281338.

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, 13106 + ... + 14082.

It is an arithmetic number, because the mean of its divisors is an integer number (1425924).

Almost surely, 2^13281338 is an apocalyptic number.

13281338 is a deficient number, since it is larger than the sum of its proper divisors (9533446).

13281338 is an equidigital number, since it uses as much as digits as its factorization.

13281338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957.

The product of its digits is 3456, while the sum is 29.

The square root of 13281338 is about 3644.3570077587. The cubic root of 13281338 is about 236.8175823360.

Adding to 13281338 its reverse (83318231), we get a palindrome (96599569).

The spelling of 13281338 in words is "thirteen million, two hundred eighty-one thousand, three hundred thirty-eight".