3686638 has 8 divisors (see below), whose sum is σ = 5664960. Its totient is φ = 1798320.

The previous prime is 3686629. The next prime is 3686651. The reversal of 3686638 is 8366863.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3686638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22398 + ... + 22561.

It is an arithmetic number, because the mean of its divisors is an integer number (708120).

Almost surely, 2^3686638 is an apocalyptic number.

3686638 is a deficient number, since it is larger than the sum of its proper divisors (1978322).

3686638 is a wasteful number, since it uses less digits than its factorization.

3686638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45002.

The product of its digits is 124416, while the sum is 40.

The square root of 3686638 is about 1920.0619781663. The cubic root of 3686638 is about 154.4816259224.

The spelling of 3686638 in words is "three million, six hundred eighty-six thousand, six hundred thirty-eight".