13681268 has 24 divisors (see below), whose sum is σ = 24868872. Its totient is φ = 6580224.

The previous prime is 13681259. The next prime is 13681271. The reversal of 13681268 is 86218631.

It can be written as a sum of positive squares in 4 ways, for example, as 3771364 + 9909904 = 1942^2 + 3148^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13880 + ... + 14832.

It is an arithmetic number, because the mean of its divisors is an integer number (1036203).

Almost surely, 2^13681268 is an apocalyptic number.

It is an amenable number.

13681268 is a deficient number, since it is larger than the sum of its proper divisors (11187604).

13681268 is a wasteful number, since it uses less digits than its factorization.

13681268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091 (or 1089 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 13681268 is about 3698.8198117778. The cubic root of 13681268 is about 239.1711454253.

Adding to 13681268 its reverse (86218631), we get a palindrome (99899899).

The spelling of 13681268 in words is "thirteen million, six hundred eighty-one thousand, two hundred sixty-eight".