13638814 has 16 divisors (see below), whose sum is σ = 23952096. Its totient is φ = 5702400.

The previous prime is 13638799. The next prime is 13638817. The reversal of 13638814 is 41883631.

It is a self number, because there is not a number n which added to its sum of digits gives 13638814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638817) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11307 + ... + 12454.

It is an arithmetic number, because the mean of its divisors is an integer number (1497006).

Almost surely, 2^13638814 is an apocalyptic number.

13638814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13638814 is a deficient number, since it is larger than the sum of its proper divisors (10313282).

13638814 is a wasteful number, since it uses less digits than its factorization.

13638814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23811.

The product of its digits is 13824, while the sum is 34.

The square root of 13638814 is about 3693.0764952814. The cubic root of 13638814 is about 238.9235004314.

The spelling of 13638814 in words is "thirteen million, six hundred thirty-eight thousand, eight hundred fourteen".