13663240 has 64 divisors (see below), whose sum is σ = 33125760. Its totient is φ = 5053440.

The previous prime is 13663231. The next prime is 13663253. The reversal of 13663240 is 4236631.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48139 + ... + 48421.

It is an arithmetic number, because the mean of its divisors is an integer number (517590).

Almost surely, 2^13663240 is an apocalyptic number.

13663240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13663240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16562880).

13663240 is an abundant number, since it is smaller than the sum of its proper divisors (19462520).

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

13663240 is a wasteful number, since it uses less digits than its factorization.

13663240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 13663240 is about 3696.3820148897. The cubic root of 13663240 is about 239.0660461832.

Adding to 13663240 its reverse (4236631), we get a palindrome (17899871).

The spelling of 13663240 in words is "thirteen million, six hundred sixty-three thousand, two hundred forty".