2213764 has 12 divisors (see below), whose sum is σ = 4427584. Its totient is φ = 948744.

The previous prime is 2213759. The next prime is 2213789. The reversal of 2213764 is 4673122.

2213764 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39504 + ... + 39559.

2^2213764 is an apocalyptic number.

It is an amenable number.

2213764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2213764 is a wasteful number, since it uses less digits than its factorization.

2213764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79074 (or 79072 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 2213764 is about 1487.8723063489. The cubic root of 2213764 is about 130.3298134346.

Adding to 2213764 its reverse (4673122), we get a palindrome (6886886).

It can be divided in two parts, 22137 and 64, that added together give a square (22201 = 149²).

The spelling of 2213764 in words is "two million, two hundred thirteen thousand, seven hundred sixty-four".