2220764 has 24 divisors (see below), whose sum is σ = 4783968. Its totient is φ = 878400.

The previous prime is 2220749. The next prime is 2220773. The reversal of 2220764 is 4670222.

2220764 is nontrivially palindromic in base 12.

2220764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2687 + ... + 3414.

It is an arithmetic number, because the mean of its divisors is an integer number (199332).

2^2220764 is an apocalyptic number.

It is an amenable number.

2220764 is an abundant number, since it is smaller than the sum of its proper divisors (2563204).

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

2220764 is a wasteful number, since it uses less digits than its factorization.

2220764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125 (or 6123 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 2220764 is about 1490.2228021340. Note that the first 3 decimals coincide. The cubic root of 2220764 is about 130.4670380583.

Adding to 2220764 its reverse (4670222), we get a palindrome (6890986).

The spelling of 2220764 in words is "two million, two hundred twenty thousand, seven hundred sixty-four".