3216404 has 12 divisors (see below), whose sum is σ = 5641524. Its totient is φ = 1604544.

The previous prime is 3216403. The next prime is 3216407. The reversal of 3216404 is 4046123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2256004 + 960400 = 1502^2 + 980^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216403) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2384 + ... + 3480.

It is an arithmetic number, because the mean of its divisors is an integer number (470127).

Almost surely, 2^3216404 is an apocalyptic number.

It is an amenable number.

3216404 is a deficient number, since it is larger than the sum of its proper divisors (2425120).

3216404 is a wasteful number, since it uses less digits than its factorization.

3216404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1832 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3216404 is about 1793.4335783630. The cubic root of 3216404 is about 147.6126344504.

The spelling of 3216404 in words is "three million, two hundred sixteen thousand, four hundred four".