3220987 has 16 divisors (see below), whose sum is σ = 4089600. Its totient is φ = 2463840.

The previous prime is 3220967. The next prime is 3221017. The reversal of 3220987 is 7890223.

It is not a de Polignac number, because 3220987 - 2⁷ = 3220859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3220907) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 4189 + ... + 4897.

It is an arithmetic number, because the mean of its divisors is an integer number (255600).

Almost surely, 2^3220987 is an apocalyptic number.

3220987 is a deficient number, since it is larger than the sum of its proper divisors (868613).

3220987 is a wasteful number, since it uses less digits than its factorization.

3220987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 3220987 is about 1794.7108402191. The cubic root of 3220987 is about 147.6827114311.

The spelling of 3220987 in words is "three million, two hundred twenty thousand, nine hundred eighty-seven".