3636861 has 16 divisors (see below), whose sum is σ = 5313600. Its totient is φ = 2202368.

The previous prime is 3636839. The next prime is 3636877. The reversal of 3636861 is 1686363.

It is a cyclic number.

It is not a de Polignac number, because 3636861 - 2⁶ = 3636797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3636361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250 + ... + 2708.

It is an arithmetic number, because the mean of its divisors is an integer number (332100).

Almost surely, 2^3636861 is an apocalyptic number.

It is an amenable number.

3636861 is a deficient number, since it is larger than the sum of its proper divisors (1676739).

3636861 is a wasteful number, since it uses less digits than its factorization.

3636861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508.

The product of its digits is 15552, while the sum is 33.

The square root of 3636861 is about 1907.0555838779. The cubic root of 3636861 is about 153.7832025590.

The spelling of 3636861 in words is "three million, six hundred thirty-six thousand, eight hundred sixty-one".