13644346 has 4 divisors (see below), whose sum is σ = 20466522. Its totient is φ = 6822172.

The previous prime is 13644331. The next prime is 13644347. The reversal of 13644346 is 64344631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10634121 + 3010225 = 3261^2 + 1735^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13644347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3411085 + ... + 3411088.

Almost surely, 2^13644346 is an apocalyptic number.

13644346 is a deficient number, since it is larger than the sum of its proper divisors (6822176).

13644346 is an equidigital number, since it uses as much as digits as its factorization.

13644346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6822175.

The product of its digits is 20736, while the sum is 31.

The square root of 13644346 is about 3693.8253884016. The cubic root of 13644346 is about 238.9557990889.

Adding to 13644346 its reverse (64344631), we get a palindrome (77988977).

The spelling of 13644346 in words is "thirteen million, six hundred forty-four thousand, three hundred forty-six".