13220444 has 6 divisors (see below), whose sum is σ = 23135784. Its totient is φ = 6610220.

The previous prime is 13220437. The next prime is 13220461. The reversal of 13220444 is 44402231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1652552 + ... + 1652559.

It is an arithmetic number, because the mean of its divisors is an integer number (3855964).

Almost surely, 2^13220444 is an apocalyptic number.

It is an amenable number.

13220444 is a deficient number, since it is larger than the sum of its proper divisors (9915340).

13220444 is a wasteful number, since it uses less digits than its factorization.

13220444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305115 (or 3305113 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 13220444 is about 3635.9928492779. The cubic root of 13220444 is about 236.4550971312.

Adding to 13220444 its reverse (44402231), we get a palindrome (57622675).

The spelling of 13220444 in words is "thirteen million, two hundred twenty thousand, four hundred forty-four".