13220344 has 8 divisors (see below), whose sum is σ = 24788160. Its totient is φ = 6610168.

The previous prime is 13220329. The next prime is 13220351. The reversal of 13220344 is 44302231.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826264 + ... + 826279.

It is an arithmetic number, because the mean of its divisors is an integer number (3098520).

Almost surely, 2^13220344 is an apocalyptic number.

It is an amenable number.

13220344 is a deficient number, since it is larger than the sum of its proper divisors (11567816).

13220344 is a wasteful number, since it uses less digits than its factorization.

13220344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652549 (or 1652545 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 13220344 is about 3635.9790978497. The cubic root of 13220344 is about 236.4545009442.

Adding to 13220344 its reverse (44302231), we get a palindrome (57522575).

The spelling of 13220344 in words is "thirteen million, two hundred twenty thousand, three hundred forty-four".