13223646 has 12 divisors (see below), whose sum is σ = 28651272. Its totient is φ = 4407876.

The previous prime is 13223633. The next prime is 13223647. The reversal of 13223646 is 64632231.

13223646 is a `hidden beast` number, since 13 + 2 + 2 + 3 + 646 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367306 + ... + 367341.

It is an arithmetic number, because the mean of its divisors is an integer number (2387606).

Almost surely, 2^13223646 is an apocalyptic number.

13223646 is an abundant number, since it is smaller than the sum of its proper divisors (15427626).

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

13223646 is a wasteful number, since it uses less digits than its factorization.

13223646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734655 (or 734652 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 13223646 is about 3636.4331425175. The cubic root of 13223646 is about 236.4741854488.

Adding to 13223646 its reverse (64632231), we get a palindrome (77855877).

The spelling of 13223646 in words is "thirteen million, two hundred twenty-three thousand, six hundred forty-six".