2164044 has 12 divisors (see below), whose sum is σ = 5049464. Its totient is φ = 721344.

The previous prime is 2164039. The next prime is 2164073. The reversal of 2164044 is 4404612.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2164044.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90157 + ... + 90180.

2^2164044 is an apocalyptic number.

It is an amenable number.

2164044 is an abundant number, since it is smaller than the sum of its proper divisors (2885420).

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

2164044 is a wasteful number, since it uses less digits than its factorization.

2164044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180344 (or 180342 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2164044 is about 1471.0689990616. The cubic root of 2164044 is about 129.3467027192.

Adding to 2164044 its reverse (4404612), we get a palindrome (6568656).

The spelling of 2164044 in words is "two million, one hundred sixty-four thousand, forty-four".