2189564 has 36 divisors (see below), whose sum is σ = 4304160. Its totient is φ = 973440.

The previous prime is 2189563. The next prime is 2189573. The reversal of 2189564 is 4659812.

2189564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (17280) is a multiple of the sum of its prime divisors (135).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189563) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 27677 + ... + 27755.

It is an arithmetic number, because the mean of its divisors is an integer number (119560).

2^2189564 is an apocalyptic number.

It is an amenable number.

2189564 is a deficient number, since it is larger than the sum of its proper divisors (2114596).

2189564 is a wasteful number, since it uses less digits than its factorization.

2189564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 135 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 2189564 is about 1479.7175406137. The cubic root of 2189564 is about 129.8531675514.

The spelling of 2189564 in words is "two million, one hundred eighty-nine thousand, five hundred sixty-four".