13391228 has 12 divisors (see below), whose sum is σ = 23461200. Its totient is φ = 6688032.

The previous prime is 13391227. The next prime is 13391237. The reversal of 13391228 is 82219331.

It is a self number, because there is not a number n which added to its sum of digits gives 13391228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13391227) 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, 4400 + ... + 6792.

It is an arithmetic number, because the mean of its divisors is an integer number (1955100).

Almost surely, 2^13391228 is an apocalyptic number.

It is an amenable number.

13391228 is a deficient number, since it is larger than the sum of its proper divisors (10069972).

13391228 is a wasteful number, since it uses less digits than its factorization.

13391228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796 (or 3794 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 13391228 is about 3659.4026834990. The cubic root of 13391228 is about 237.4689333326.

The spelling of 13391228 in words is "thirteen million, three hundred ninety-one thousand, two hundred twenty-eight".