13689128 has 16 divisors (see below), whose sum is σ = 25714260. Its totient is φ = 6832000.

The previous prime is 13689127. The next prime is 13689133. The reversal of 13689128 is 82198631.

It can be written as a sum of positive squares in 2 ways, for example, as 13675204 + 13924 = 3698^2 + 118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13689091 and 13689100.

It is not an unprimeable number, because it can be changed into a prime (13689127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4388 + ... + 6828.

Almost surely, 2^13689128 is an apocalyptic number.

It is an amenable number.

13689128 is a deficient number, since it is larger than the sum of its proper divisors (12025132).

13689128 is a wasteful number, since it uses less digits than its factorization.

13689128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3148 (or 3144 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 13689128 is about 3699.8821602856. The cubic root of 13689128 is about 239.2169385812.

The spelling of 13689128 in words is "thirteen million, six hundred eighty-nine thousand, one hundred twenty-eight".