13388638 has 8 divisors (see below), whose sum is σ = 20358288. Its totient is φ = 6602544.

The previous prime is 13388629. The next prime is 13388651. The reversal of 13388638 is 83688331.

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

It is a self number, because there is not a number n which added to its sum of digits gives 13388638.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 45706 + ... + 45997.

It is an arithmetic number, because the mean of its divisors is an integer number (2544786).

Almost surely, 2^13388638 is an apocalyptic number.

13388638 is a deficient number, since it is larger than the sum of its proper divisors (6969650).

13388638 is an equidigital number, since it uses as much as digits as its factorization.

13388638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91778.

The product of its digits is 82944, while the sum is 40.

The square root of 13388638 is about 3659.0487834955. The cubic root of 13388638 is about 237.4536227080.

The spelling of 13388638 in words is "thirteen million, three hundred eighty-eight thousand, six hundred thirty-eight".