3686865 has 64 divisors (see below), whose sum is σ = 7558656. Its totient is φ = 1492992.

The previous prime is 3686849. The next prime is 3686867. The reversal of 3686865 is 5686863.

It is not a de Polignac number, because 3686865 - 2⁴ = 3686849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686867) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50469 + ... + 50541.

It is an arithmetic number, because the mean of its divisors is an integer number (118104).

Almost surely, 2^3686865 is an apocalyptic number.

3686865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3686865 is an abundant number, since it is smaller than the sum of its proper divisors (3871791).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3686865 is a wasteful number, since it uses less digits than its factorization.

3686865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138.

The product of its digits is 207360, while the sum is 42.

The square root of 3686865 is about 1920.1210899316. The cubic root of 3686865 is about 154.4847965266.

The spelling of 3686865 in words is "three million, six hundred eighty-six thousand, eight hundred sixty-five".