3638685 has 16 divisors (see below), whose sum is σ = 5903424. Its totient is φ = 1913472.

The previous prime is 3638653. The next prime is 3638699. The reversal of 3638685 is 5868363.

It is not a de Polignac number, because 3638685 - 2⁵ = 3638653 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 567 + ... + 2756.

It is an arithmetic number, because the mean of its divisors is an integer number (368964).

Almost surely, 2^3638685 is an apocalyptic number.

It is an amenable number.

3638685 is a deficient number, since it is larger than the sum of its proper divisors (2264739).

3638685 is a wasteful number, since it uses less digits than its factorization.

3638685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404.

The product of its digits is 103680, while the sum is 39.

The square root of 3638685 is about 1907.5337480632. The cubic root of 3638685 is about 153.8089072973.

The spelling of 3638685 in words is "three million, six hundred thirty-eight thousand, six hundred eighty-five".