3639656 has 16 divisors (see below), whose sum is σ = 6844740. Its totient is φ = 1814400.

The previous prime is 3639637. The next prime is 3639661. The reversal of 3639656 is 6569363.

3639656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3422500 + 217156 = 1850^2 + 466^2 .

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, 4430 + ... + 5186.

Almost surely, 2^3639656 is an apocalyptic number.

It is an amenable number.

3639656 is a deficient number, since it is larger than the sum of its proper divisors (3205084).

3639656 is a wasteful number, since it uses less digits than its factorization.

3639656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364 (or 1360 counting only the distinct ones).

The product of its digits is 87480, while the sum is 38.

The square root of 3639656 is about 1907.7882482079. The cubic root of 3639656 is about 153.8225876211.

The spelling of 3639656 in words is "three million, six hundred thirty-nine thousand, six hundred fifty-six".