2644244 has 6 divisors (see below), whose sum is σ = 4627434. Its totient is φ = 1322120.

The previous prime is 2644219. The next prime is 2644247. The reversal of 2644244 is 4424462.

It can be written as a sum of positive squares in only one way, i.e., 2521744 + 122500 = 1588^2 + 350^2 .

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁴ + 4 + 4⁵ + 2²¹ + 4⁶ + 4⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330527 + ... + 330534.

It is an arithmetic number, because the mean of its divisors is an integer number (771239).

2^2644244 is an apocalyptic number.

It is an amenable number.

2644244 is a deficient number, since it is larger than the sum of its proper divisors (1983190).

2644244 is a wasteful number, since it uses less digits than its factorization.

2644244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661065 (or 661063 counting only the distinct ones).

The product of its digits is 6144, while the sum is 26.

The square root of 2644244 is about 1626.1131571942. The cubic root of 2644244 is about 138.2824851422.

The spelling of 2644244 in words is "two million, six hundred forty-four thousand, two hundred forty-four".