2645644 has 24 divisors (see below), whose sum is σ = 4888800. Its totient is φ = 1250304.

The previous prime is 2645639. The next prime is 2645647. The reversal of 2645644 is 4465462.

It is not an unprimeable number, because it can be changed into a prime (2645647) 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, 13612 + ... + 13804.

It is an arithmetic number, because the mean of its divisors is an integer number (203700).

2^2645644 is an apocalyptic number.

It is an amenable number.

2645644 is a deficient number, since it is larger than the sum of its proper divisors (2243156).

2645644 is a wasteful number, since it uses less digits than its factorization.

2645644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 367 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 2645644 is about 1626.5435745777. The cubic root of 2645644 is about 138.3068854778.

The spelling of 2645644 in words is "two million, six hundred forty-five thousand, six hundred forty-four".