2013644 has 12 divisors (see below), whose sum is σ = 3645600. Its totient is φ = 972048.

The previous prime is 2013619. The next prime is 2013653. The reversal of 2013644 is 4463102.

It is a happy number.

It is a super-4 number, since 4×2013644⁴ (a number of 26 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8564 + ... + 8795.

It is an arithmetic number, because the mean of its divisors is an integer number (303800).

2^2013644 is an apocalyptic number.

It is an amenable number.

2013644 is a deficient number, since it is larger than the sum of its proper divisors (1631956).

2013644 is a wasteful number, since it uses less digits than its factorization.

2013644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17392 (or 17390 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2013644 is about 1419.0292456465. The cubic root of 2013644 is about 126.2779619795.

Adding to 2013644 its reverse (4463102), we get a palindrome (6476746).

The spelling of 2013644 in words is "two million, thirteen thousand, six hundred forty-four".