3220391 has 8 divisors (see below), whose sum is σ = 3384960. Its totient is φ = 3057912.

The previous prime is 3220381. The next prime is 3220409. The reversal of 3220391 is 1930223.

3220391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3220391 - 2¹⁸ = 2958247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3320 + ... + 4178.

It is an arithmetic number, because the mean of its divisors is an integer number (423120).

Almost surely, 2^3220391 is an apocalyptic number.

3220391 is a deficient number, since it is larger than the sum of its proper divisors (164569).

3220391 is a wasteful number, since it uses less digits than its factorization.

3220391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 3220391 is about 1794.5447890760. The cubic root of 3220391 is about 147.6736019743.

The spelling of 3220391 in words is "three million, two hundred twenty thousand, three hundred ninety-one".