13638260 has 12 divisors (see below), whose sum is σ = 28640388. Its totient is φ = 5455296.

The previous prime is 13638259. The next prime is 13638269. The reversal of 13638260 is 6283631.

It can be written as a sum of positive squares in 2 ways, for example, as 5216656 + 8421604 = 2284^2 + 2902^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638269) 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, 340937 + ... + 340976.

It is an arithmetic number, because the mean of its divisors is an integer number (2386699).

Almost surely, 2^13638260 is an apocalyptic number.

13638260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13638260 is an abundant number, since it is smaller than the sum of its proper divisors (15002128).

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

13638260 is a wasteful number, since it uses less digits than its factorization.

13638260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681922 (or 681920 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 13638260 is about 3693.0014893038. The cubic root of 13638260 is about 238.9202654138.

The spelling of 13638260 in words is "thirteen million, six hundred thirty-eight thousand, two hundred sixty".