13638481 has 8 divisors (see below), whose sum is σ = 14259200. Its totient is φ = 13029120.

The previous prime is 13638479. The next prime is 13638503. The reversal of 13638481 is 18483631.

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

It is a cyclic number.

It is not a de Polignac number, because 13638481 - 2¹ = 13638479 is a prime.

It is a super-2 number, since 2×13638481² = 372016327974722, which contains 22 as substring.

It is a Duffinian 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 in 7 ways as a sum of consecutive naturals, for example, 336 + ... + 5233.

It is an arithmetic number, because the mean of its divisors is an integer number (1782400).

Almost surely, 2^13638481 is an apocalyptic number.

It is an amenable number.

13638481 is a deficient number, since it is larger than the sum of its proper divisors (620719).

13638481 is an equidigital number, since it uses as much as digits as its factorization.

13638481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679.

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

The square root of 13638481 is about 3693.0314106436. The cubic root of 13638481 is about 238.9215559277.

The spelling of 13638481 in words is "thirteen million, six hundred thirty-eight thousand, four hundred eighty-one".