13638605 has 8 divisors (see below), whose sum is σ = 16894464. Its totient is φ = 10558800.

The previous prime is 13638593. The next prime is 13638623. The reversal of 13638605 is 50683631.

13638605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13638605 - 2¹⁰ = 13637581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43841 + ... + 44150.

It is an arithmetic number, because the mean of its divisors is an integer number (2111808).

Almost surely, 2^13638605 is an apocalyptic number.

It is an amenable number.

13638605 is a deficient number, since it is larger than the sum of its proper divisors (3255859).

13638605 is an equidigital number, since it uses as much as digits as its factorization.

13638605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88027.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 13638605 is about 3693.0481989814. The cubic root of 13638605 is about 238.9222800109.

The spelling of 13638605 in words is "thirteen million, six hundred thirty-eight thousand, six hundred five".