3643556 has 12 divisors (see below), whose sum is σ = 7287168. Its totient is φ = 1561512.

The previous prime is 3643537. The next prime is 3643561. The reversal of 3643556 is 6553463.

3643556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

3643556 is an admirable number.

It is a d-powerful number, because it can be written as 3³ + 6 + 4⁶ + 3⁸ + 5³ + 5⁹ + 6⁸ .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65036 + ... + 65091.

It is an arithmetic number, because the mean of its divisors is an integer number (607264).

Almost surely, 2^3643556 is an apocalyptic number.

It is an amenable number.

3643556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3643556 is a wasteful number, since it uses less digits than its factorization.

3643556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130138 (or 130136 counting only the distinct ones).

The product of its digits is 32400, while the sum is 32.

The square root of 3643556 is about 1908.8101005600. The cubic root of 3643556 is about 153.8775098395.

The spelling of 3643556 in words is "three million, six hundred forty-three thousand, five hundred fifty-six".