13638424 has 8 divisors (see below), whose sum is σ = 25572060. Its totient is φ = 6819208.

The previous prime is 13638421. The next prime is 13638451. The reversal of 13638424 is 42483631.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852394 + ... + 852409.

Almost surely, 2^13638424 is an apocalyptic number.

It is an amenable number.

13638424 is a deficient number, since it is larger than the sum of its proper divisors (11933636).

13638424 is a wasteful number, since it uses less digits than its factorization.

13638424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704809 (or 1704805 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 13638424 is about 3693.0236933981. The cubic root of 13638424 is about 238.9212230816.

The spelling of 13638424 in words is "thirteen million, six hundred thirty-eight thousand, four hundred twenty-four".