3220864 has 16 divisors (see below), whose sum is σ = 6416820. Its totient is φ = 1610368.

The previous prime is 3220859. The next prime is 3220873. The reversal of 3220864 is 4680223.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12454 + ... + 12709.

Almost surely, 2^3220864 is an apocalyptic number.

It is an amenable number.

3220864 is a deficient number, since it is larger than the sum of its proper divisors (3195956).

3220864 is an equidigital number, since it uses as much as digits as its factorization.

3220864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25177 (or 25165 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 3220864 is about 1794.6765725333. The cubic root of 3220864 is about 147.6808315513.

The spelling of 3220864 in words is "three million, two hundred twenty thousand, eight hundred sixty-four".