13668638 has 8 divisors (see below), whose sum is σ = 21582120. Its totient is φ = 6474600.

The previous prime is 13668637. The next prime is 13668653. The reversal of 13668638 is 83686631.

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

It is a junction number, because it is equal to n+sod(n) for n = 13668595 and 13668604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13668631) 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, 179813 + ... + 179888.

It is an arithmetic number, because the mean of its divisors is an integer number (2697765).

Almost surely, 2^13668638 is an apocalyptic number.

13668638 is a deficient number, since it is larger than the sum of its proper divisors (7913482).

13668638 is a wasteful number, since it uses less digits than its factorization.

13668638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359722.

The product of its digits is 124416, while the sum is 41.

The square root of 13668638 is about 3697.1121162334. The cubic root of 13668638 is about 239.0975250176.

The spelling of 13668638 in words is "thirteen million, six hundred sixty-eight thousand, six hundred thirty-eight".