2005636 has 6 divisors (see below), whose sum is σ = 3509870. Its totient is φ = 1002816.

The previous prime is 2005613. The next prime is 2005667. The reversal of 2005636 is 6365002.

It can be written as a sum of positive squares in only one way, i.e., 1638400 + 367236 = 1280^2 + 606^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250701 + ... + 250708.

2^2005636 is an apocalyptic number.

It is an amenable number.

2005636 is a deficient number, since it is larger than the sum of its proper divisors (1504234).

2005636 is a wasteful number, since it uses less digits than its factorization.

2005636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501413 (or 501411 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 2005636 is about 1416.2047874513. The cubic root of 2005636 is about 126.1103425784.

The spelling of 2005636 in words is "two million, five thousand, six hundred thirty-six".