13638738 has 16 divisors (see below), whose sum is σ = 27336096. Its totient is φ = 4536480.

The previous prime is 13638707. The next prime is 13638739. The reversal of 13638738 is 83783631.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13638696 and 13638705.

It is not an unprimeable number, because it can be changed into a prime (13638739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945 + ... + 5307.

It is an arithmetic number, because the mean of its divisors is an integer number (1708506).

Almost surely, 2^13638738 is an apocalyptic number.

13638738 is an abundant number, since it is smaller than the sum of its proper divisors (13697358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13638738 is a wasteful number, since it uses less digits than its factorization.

13638738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4889.

The product of its digits is 72576, while the sum is 39.

The square root of 13638738 is about 3693.0662057429. The cubic root of 13638738 is about 238.9230566436.

It can be divided in two parts, 1363 and 8738, that added together give a palindrome (10101).

The spelling of 13638738 in words is "thirteen million, six hundred thirty-eight thousand, seven hundred thirty-eight".