2166944 has 24 divisors (see below), whose sum is σ = 4595220. Its totient is φ = 999936.

The previous prime is 2166943. The next prime is 2166947. The reversal of 2166944 is 4496612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2131600 + 35344 = 1460^2 + 188^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2166944.

It is not an unprimeable number, because it can be changed into a prime (2166943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2189 + ... + 3020.

2^2166944 is an apocalyptic number.

It is an amenable number.

2166944 is an abundant number, since it is smaller than the sum of its proper divisors (2428276).

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

2166944 is a wasteful number, since it uses less digits than its factorization.

2166944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232 (or 5224 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 2166944 is about 1472.0543468228. The cubic root of 2166944 is about 129.4044553966.

The spelling of 2166944 in words is "two million, one hundred sixty-six thousand, nine hundred forty-four".