13220804 has 6 divisors (see below), whose sum is σ = 23136414. Its totient is φ = 6610400.

The previous prime is 13220773. The next prime is 13220843. The reversal of 13220804 is 40802231.

It can be written as a sum of positive squares in only one way, i.e., 6708100 + 6512704 = 2590^2 + 2552^2 .

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, 1652597 + ... + 1652604.

It is an arithmetic number, because the mean of its divisors is an integer number (3856069).

Almost surely, 2^13220804 is an apocalyptic number.

It is an amenable number.

13220804 is a deficient number, since it is larger than the sum of its proper divisors (9915610).

13220804 is a wasteful number, since it uses less digits than its factorization.

13220804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305205 (or 3305203 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 13220804 is about 3636.0423539887. The cubic root of 13220804 is about 236.4572433794.

The spelling of 13220804 in words is "thirteen million, two hundred twenty thousand, eight hundred four".