2644090 has 16 divisors (see below), whose sum is σ = 4876200. Its totient is φ = 1031680.

The previous prime is 2644073. The next prime is 2644091. The reversal of 2644090 is 904462.

It can be written as a sum of positive squares in 4 ways, for example, as 2163841 + 480249 = 1471^2 + 693^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2815 + ... + 3634.

2^2644090 is an apocalyptic number.

2644090 is a deficient number, since it is larger than the sum of its proper divisors (2232110).

2644090 is a wasteful number, since it uses less digits than its factorization.

2644090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6497.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2644090 is about 1626.0658043265. The cubic root of 2644090 is about 138.2798005796.

The spelling of 2644090 in words is "two million, six hundred forty-four thousand, ninety".