2216604 has 36 divisors (see below), whose sum is σ = 5605656. Its totient is φ = 681408.

The previous prime is 2216603. The next prime is 2216609. The reversal of 2216604 is 4066122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1482 + ... + 2574.

2^2216604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2216604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2802828).

2216604 is an abundant number, since it is smaller than the sum of its proper divisors (3389052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2216604 is a wasteful number, since it uses less digits than its factorization.

2216604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2216604 is about 1488.8263834309. The cubic root of 2216604 is about 130.3855222488.

The spelling of 2216604 in words is "two million, two hundred sixteen thousand, six hundred four".