2644263 has 12 divisors (see below), whose sum is σ = 3839160. Its totient is φ = 1753776.

The previous prime is 2644261. The next prime is 2644277. The reversal of 2644263 is 3624462.

It is not a de Polignac number, because 2644263 - 2¹ = 2644261 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 4² + 4² + 2¹⁹ + 6⁴ + 3¹³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1420 + ... + 2702.

It is an arithmetic number, because the mean of its divisors is an integer number (319930).

2^2644263 is an apocalyptic number.

2644263 is a deficient number, since it is larger than the sum of its proper divisors (1194897).

2644263 is a wasteful number, since it uses less digits than its factorization.

2644263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1515 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 2644263 is about 1626.1189993355. The cubic root of 2644263 is about 138.2828163473.

The spelling of 2644263 in words is "two million, six hundred forty-four thousand, two hundred sixty-three".