2580644 has 24 divisors (see below), whose sum is σ = 4989600. Its totient is φ = 1158080.

The previous prime is 2580631. The next prime is 2580647. The reversal of 2580644 is 4460852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2580647) 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, 3587 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (207900).

2^2580644 is an apocalyptic number.

It is an amenable number.

2580644 is a deficient number, since it is larger than the sum of its proper divisors (2408956).

2580644 is a wasteful number, since it uses less digits than its factorization.

2580644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 761 counting only the distinct ones).

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

The square root of 2580644 is about 1606.4382963563. The cubic root of 2580644 is about 137.1648077877.

It can be divided in two parts, 258064 and 4, that multiplied together give a square (1032256 = 1016²).

The spelling of 2580644 in words is "two million, five hundred eighty thousand, six hundred forty-four".