13638328 has 16 divisors (see below), whose sum is σ = 27896760. Its totient is φ = 6199200.

The previous prime is 13638307. The next prime is 13638329. The reversal of 13638328 is 82383631.

It is a junction number, because it is equal to n+sod(n) for n = 13638293 and 13638302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77403 + ... + 77578.

Almost surely, 2^13638328 is an apocalyptic number.

It is an amenable number.

13638328 is an abundant number, since it is smaller than the sum of its proper divisors (14258432).

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

13638328 is a wasteful number, since it uses less digits than its factorization.

13638328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154998 (or 154994 counting only the distinct ones).

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

The square root of 13638328 is about 3693.0106958957. The cubic root of 13638328 is about 238.9206624965.

The spelling of 13638328 in words is "thirteen million, six hundred thirty-eight thousand, three hundred twenty-eight".