3218444 has 6 divisors (see below), whose sum is σ = 5632284. Its totient is φ = 1609220.

The previous prime is 3218437. The next prime is 3218447. The reversal of 3218444 is 4448123.

It is a super-2 number, since 2×3218444² = 20716763562272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3218447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402302 + ... + 402309.

It is an arithmetic number, because the mean of its divisors is an integer number (938714).

Almost surely, 2^3218444 is an apocalyptic number.

It is an amenable number.

3218444 is a deficient number, since it is larger than the sum of its proper divisors (2413840).

3218444 is a wasteful number, since it uses less digits than its factorization.

3218444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804615 (or 804613 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 3218444 is about 1794.0022296530. The cubic root of 3218444 is about 147.6438355613.

The spelling of 3218444 in words is "three million, two hundred eighteen thousand, four hundred forty-four".