2644749 has 6 divisors (see below), whose sum is σ = 3820206. Its totient is φ = 1763160.

The previous prime is 2644729. The next prime is 2644751. The reversal of 2644749 is 9474462.

2644749 is a `hidden beast` number, since 2 + 644 + 7 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2082249 + 562500 = 1443^2 + 750^2 .

It is not a de Polignac number, because 2644749 - 2¹⁵ = 2611981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146922 + ... + 146939.

It is an arithmetic number, because the mean of its divisors is an integer number (636701).

2^2644749 is an apocalyptic number.

It is an amenable number.

2644749 is a deficient number, since it is larger than the sum of its proper divisors (1175457).

2644749 is a wasteful number, since it uses less digits than its factorization.

2644749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293867 (or 293864 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 2644749 is about 1626.2684280278. The cubic root of 2644749 is about 138.2912876846.

It can be divided in two parts, 264 and 4749, that multiplied together give a triangular number (1253736 = T₁₅₈₃).

The spelling of 2644749 in words is "two million, six hundred forty-four thousand, seven hundred forty-nine".