2605844 has 6 divisors (see below), whose sum is σ = 4560234. Its totient is φ = 1302920.

The previous prime is 2605819. The next prime is 2605847. The reversal of 2605844 is 4485062.

It can be written as a sum of positive squares in only one way, i.e., 2521744 + 84100 = 1588^2 + 290^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325727 + ... + 325734.

It is an arithmetic number, because the mean of its divisors is an integer number (760039).

2^2605844 is an apocalyptic number.

It is an amenable number.

2605844 is a deficient number, since it is larger than the sum of its proper divisors (1954390).

2605844 is a wasteful number, since it uses less digits than its factorization.

2605844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651465 (or 651463 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2605844 is about 1614.2626799874. The cubic root of 2605844 is about 137.6098340051.

The spelling of 2605844 in words is "two million, six hundred five thousand, eight hundred forty-four".