2644036 has 6 divisors (see below), whose sum is σ = 4627070. Its totient is φ = 1322016.

The previous prime is 2644007. The next prime is 2644039. The reversal of 2644036 is 6304462.

It can be written as a sum of positive squares in only one way, i.e., 2383936 + 260100 = 1544^2 + 510^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2644036.

It is not an unprimeable number, because it can be changed into a prime (2644039) by changing a digit.

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 as a sum of consecutive naturals, namely, 330501 + ... + 330508.

2^2644036 is an apocalyptic number.

It is an amenable number.

2644036 is a deficient number, since it is larger than the sum of its proper divisors (1983034).

2644036 is a wasteful number, since it uses less digits than its factorization.

2644036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661013 (or 661011 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 2644036 is about 1626.0491997477. The cubic root of 2644036 is about 138.2788592147.

Adding to 2644036 its reverse (6304462), we get a palindrome (8948498).

The spelling of 2644036 in words is "two million, six hundred forty-four thousand, thirty-six".