3985636 has 6 divisors (see below), whose sum is σ = 6974870. Its totient is φ = 1992816.

The previous prime is 3985621. The next prime is 3985637. The reversal of 3985636 is 6365893.

3985636 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 only one way, i.e., 2560000 + 1425636 = 1600^2 + 1194^2 .

It is not an unprimeable number, because it can be changed into a prime (3985637) by changing a digit.

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 as a sum of consecutive naturals, namely, 498201 + ... + 498208.

Almost surely, 2^3985636 is an apocalyptic number.

It is an amenable number.

3985636 is a deficient number, since it is larger than the sum of its proper divisors (2989234).

3985636 is a wasteful number, since it uses less digits than its factorization.

3985636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996413 (or 996411 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 3985636 is about 1996.4057703784. The cubic root of 3985636 is about 158.5498653918.

The spelling of 3985636 in words is "three million, nine hundred eighty-five thousand, six hundred thirty-six".