13686738 has 32 divisors (see below), whose sum is σ = 29647296. Its totient is φ = 4187328.

The previous prime is 13686727. The next prime is 13686763. The reversal of 13686738 is 83768631.

It is a self number, because there is not a number n which added to its sum of digits gives 13686738.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17320 + ... + 18092.

It is an arithmetic number, because the mean of its divisors is an integer number (926478).

Almost surely, 2^13686738 is an apocalyptic number.

13686738 is an abundant number, since it is smaller than the sum of its proper divisors (15960558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13686738 is a wasteful number, since it uses less digits than its factorization.

13686738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018.

The product of its digits is 145152, while the sum is 42.

The square root of 13686738 is about 3699.5591629274. The cubic root of 13686738 is about 239.2030160543.

The spelling of 13686738 in words is "thirteen million, six hundred eighty-six thousand, seven hundred thirty-eight".