3581636 has 12 divisors (see below), whose sum is σ = 6288828. Its totient is φ = 1784832.

The previous prime is 3581621. The next prime is 3581639. The reversal of 3581636 is 6361853.

3581636 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 1638400 + 1943236 = 1280^2 + 1394^2 .

It is not an unprimeable number, because it can be changed into a prime (3581639) 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 in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 2676.

It is an arithmetic number, because the mean of its divisors is an integer number (524069).

Almost surely, 2^3581636 is an apocalyptic number.

It is an amenable number.

3581636 is a deficient number, since it is larger than the sum of its proper divisors (2707192).

3581636 is a wasteful number, since it uses less digits than its factorization.

3581636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998 (or 2996 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 3581636 is about 1892.5210698959. The cubic root of 3581636 is about 153.0008401281. Note that the first 3 decimals are identical.

The spelling of 3581636 in words is "three million, five hundred eighty-one thousand, six hundred thirty-six".