13638238 has 8 divisors (see below), whose sum is σ = 21534120. Its totient is φ = 6460200.

The previous prime is 13638223. The next prime is 13638239. The reversal of 13638238 is 83283631.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638239) 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 3 ways as a sum of consecutive naturals, for example, 179413 + ... + 179488.

It is an arithmetic number, because the mean of its divisors is an integer number (2691765).

Almost surely, 2^13638238 is an apocalyptic number.

13638238 is a deficient number, since it is larger than the sum of its proper divisors (7895882).

13638238 is a wasteful number, since it uses less digits than its factorization.

13638238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358922.

The product of its digits is 20736, while the sum is 34.

The square root of 13638238 is about 3692.9985106956. The cubic root of 13638238 is about 238.9201369456.

The spelling of 13638238 in words is "thirteen million, six hundred thirty-eight thousand, two hundred thirty-eight".