13553638 has 8 divisors (see below), whose sum is σ = 23234832. Its totient is φ = 5808696.

The previous prime is 13553633. The next prime is 13553671. The reversal of 13553638 is 83635531.

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

It is a super-2 number, since 2×13553638² = 367402206070088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13553633) 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, 484045 + ... + 484072.

It is an arithmetic number, because the mean of its divisors is an integer number (2904354).

Almost surely, 2^13553638 is an apocalyptic number.

13553638 is a deficient number, since it is larger than the sum of its proper divisors (9681194).

13553638 is an equidigital number, since it uses as much as digits as its factorization.

13553638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968126.

The product of its digits is 32400, while the sum is 34.

The square root of 13553638 is about 3681.5265855349. The cubic root of 13553638 is about 238.4250929813.

The spelling of 13553638 in words is "thirteen million, five hundred fifty-three thousand, six hundred thirty-eight".