3643636 has 6 divisors (see below), whose sum is σ = 6376370. Its totient is φ = 1821816.

The previous prime is 3643631. The next prime is 3643639. The reversal of 3643636 is 6363463.

It can be written as a sum of positive squares in only one way, i.e., 2702736 + 940900 = 1644^2 + 970^2 .

3643636 is a modest number, since divided by 3636 gives 364 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 3643598 and 3643607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455451 + ... + 455458.

Almost surely, 2^3643636 is an apocalyptic number.

It is an amenable number.

3643636 is a deficient number, since it is larger than the sum of its proper divisors (2732734).

3643636 is a wasteful number, since it uses less digits than its factorization.

3643636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910913 (or 910911 counting only the distinct ones).

The product of its digits is 23328, while the sum is 31.

The square root of 3643636 is about 1908.8310559083. The cubic root of 3643636 is about 153.8786360388.

The spelling of 3643636 in words is "three million, six hundred forty-three thousand, six hundred thirty-six".