2643944 has 16 divisors (see below), whose sum is σ = 4989600. Its totient is φ = 1313392.

The previous prime is 2643943. The next prime is 2643947. The reversal of 2643944 is 4493462.

2643944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2 + 6 + 4 + 3¹³ + 9 + 4⁵ + 4¹⁰ .

It is a self number, because there is not a number n which added to its sum of digits gives 2643944.

It is not an unprimeable number, because it can be changed into a prime (2643943) 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 3 ways as a sum of consecutive naturals, for example, 347 + ... + 2325.

It is an arithmetic number, because the mean of its divisors is an integer number (311850).

2^2643944 is an apocalyptic number.

It is an amenable number.

2643944 is a deficient number, since it is larger than the sum of its proper divisors (2345656).

2643944 is a wasteful number, since it uses less digits than its factorization.

2643944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 2148 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 2643944 is about 1626.0209100747. The cubic root of 2643944 is about 138.2772553785.

The spelling of 2643944 in words is "two million, six hundred forty-three thousand, nine hundred forty-four".