13220768 has 72 divisors (see below), whose sum is σ = 30100896. Its totient is φ = 5667200.

The previous prime is 13220749. The next prime is 13220773. The reversal of 13220768 is 86702231.

It is a happy number.

13220768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13220768.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186173 + ... + 186243.

It is an arithmetic number, because the mean of its divisors is an integer number (418068).

Almost surely, 2^13220768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13220768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15050448).

13220768 is an abundant number, since it is smaller than the sum of its proper divisors (16880128).

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

13220768 is a wasteful number, since it uses less digits than its factorization.

13220768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 13220768 is about 3636.0374035480. The cubic root of 13220768 is about 236.4570287563.

Adding to 13220768 its reverse (86702231), we get a palindrome (99922999).

The spelling of 13220768 in words is "thirteen million, two hundred twenty thousand, seven hundred sixty-eight".