13638415 has 12 divisors (see below), whose sum is σ = 19038456. Its totient is φ = 9351888.

The previous prime is 13638397. The next prime is 13638421. The reversal of 13638415 is 51483631.

It is not a de Polignac number, because 13638415 - 2⁹ = 13637903 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 27589 + ... + 28078.

It is an arithmetic number, because the mean of its divisors is an integer number (1586538).

Almost surely, 2^13638415 is an apocalyptic number.

13638415 is a deficient number, since it is larger than the sum of its proper divisors (5400041).

13638415 is an equidigital number, since it uses as much as digits as its factorization.

13638415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55686 (or 55679 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 13638415 is about 3693.0224748842. The cubic root of 13638415 is about 238.9211705268.

The spelling of 13638415 in words is "thirteen million, six hundred thirty-eight thousand, four hundred fifteen".