3636645 has 32 divisors (see below), whose sum is σ = 6193152. Its totient is φ = 1818432.

The previous prime is 3636631. The next prime is 3636667. The reversal of 3636645 is 5466363.

It is a happy number.

It is not a de Polignac number, because 3636645 - 2⁸ = 3636389 is a prime.

3636645 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28572 + ... + 28698.

It is an arithmetic number, because the mean of its divisors is an integer number (193536).

Almost surely, 2^3636645 is an apocalyptic number.

It is an amenable number.

3636645 is a deficient number, since it is larger than the sum of its proper divisors (2556507).

3636645 is a wasteful number, since it uses less digits than its factorization.

3636645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241.

The product of its digits is 38880, while the sum is 33.

The square root of 3636645 is about 1906.9989512320. The cubic root of 3636645 is about 153.7801580077.

The spelling of 3636645 in words is "three million, six hundred thirty-six thousand, six hundred forty-five".