13566138 has 8 divisors (see below), whose sum is σ = 27132288. Its totient is φ = 4522044.

The previous prime is 13566109. The next prime is 13566169. The reversal of 13566138 is 83166531.

It is a sphenic number, since it is the product of 3 distinct primes.

13566138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 13566099 and 13566108.

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, 1130506 + ... + 1130517.

It is an arithmetic number, because the mean of its divisors is an integer number (3391536).

Almost surely, 2^13566138 is an apocalyptic number.

13566138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13566138 is a wasteful number, since it uses less digits than its factorization.

13566138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261028.

The product of its digits is 12960, while the sum is 33.

The square root of 13566138 is about 3683.2238596099. The cubic root of 13566138 is about 238.4983672299.

The spelling of 13566138 in words is "thirteen million, five hundred sixty-six thousand, one hundred thirty-eight".