2573644 has 12 divisors (see below), whose sum is σ = 4534768. Its totient is φ = 1278000.

The previous prime is 2573633. The next prime is 2573653. The reversal of 2573644 is 4463752.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527 + ... + 2734.

2^2573644 is an apocalyptic number.

It is an amenable number.

2573644 is a deficient number, since it is larger than the sum of its proper divisors (1961124).

2573644 is a wasteful number, since it uses less digits than its factorization.

2573644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416 (or 4414 counting only the distinct ones).

The product of its digits is 20160, while the sum is 31.

The square root of 2573644 is about 1604.2580839753. The cubic root of 2573644 is about 137.0406755809.

The spelling of 2573644 in words is "two million, five hundred seventy-three thousand, six hundred forty-four".