13128688 has 20 divisors (see below), whose sum is σ = 25612200. Its totient is φ = 6519104.

The previous prime is 13128667. The next prime is 13128701. The reversal of 13128688 is 88682131.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 370 + ... + 5137.

It is an arithmetic number, because the mean of its divisors is an integer number (1280610).

Almost surely, 2^13128688 is an apocalyptic number.

It is an amenable number.

13128688 is a deficient number, since it is larger than the sum of its proper divisors (12483512).

13128688 is a wasteful number, since it uses less digits than its factorization.

13128688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664 (or 5658 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 13128688 is about 3623.3531431535. The cubic root of 13128688 is about 235.9067907314.

It can be divided in two parts, 1312 and 8688, that added together give a 4-th power (10000 = 10⁴).

The spelling of 13128688 in words is "thirteen million, one hundred twenty-eight thousand, six hundred eighty-eight".