3686641 has 8 divisors (see below), whose sum is σ = 4230464. Its totient is φ = 3147120.

The previous prime is 3686629. The next prime is 3686651. The reversal of 3686641 is 1466863.

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

It is a cyclic number.

It is not a de Polignac number, because 3686641 - 2⁵ = 3686609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3686597 and 3686606.

It is not an unprimeable number, because it can be changed into a prime (3686621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 2911.

It is an arithmetic number, because the mean of its divisors is an integer number (528808).

Almost surely, 2^3686641 is an apocalyptic number.

It is an amenable number.

3686641 is a deficient number, since it is larger than the sum of its proper divisors (543823).

3686641 is a wasteful number, since it uses less digits than its factorization.

3686641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151.

The product of its digits is 20736, while the sum is 34.

The square root of 3686641 is about 1920.0627593910. The cubic root of 3686641 is about 154.4816678255.

The spelling of 3686641 in words is "three million, six hundred eighty-six thousand, six hundred forty-one".