3220646 has 16 divisors (see below), whose sum is σ = 5676048. Its totient is φ = 1351200.

The previous prime is 3220639. The next prime is 3220661. The reversal of 3220646 is 6460223.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5345 + ... + 5916.

It is an arithmetic number, because the mean of its divisors is an integer number (354753).

Almost surely, 2^3220646 is an apocalyptic number.

3220646 is a deficient number, since it is larger than the sum of its proper divisors (2455402).

3220646 is a wasteful number, since it uses less digits than its factorization.

3220646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11287.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 3220646 is about 1794.6158363282. The cubic root of 3220646 is about 147.6774996143.

Adding to 3220646 its reverse (6460223), we get a palindrome (9680869).

The spelling of 3220646 in words is "three million, two hundred twenty thousand, six hundred forty-six".