3686859 has 24 divisors (see below), whose sum is σ = 5870592. Its totient is φ = 2211120.

The previous prime is 3686849. The next prime is 3686867. The reversal of 3686859 is 9586863.

It is not a de Polignac number, because 3686859 - 2⁷ = 3686731 is a prime.

It is a super-3 number, since 3×3686859³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16422 + ... + 16644.

It is an arithmetic number, because the mean of its divisors is an integer number (244608).

Almost surely, 2^3686859 is an apocalyptic number.

3686859 is a deficient number, since it is larger than the sum of its proper divisors (2183733).

3686859 is a wasteful number, since it uses less digits than its factorization.

3686859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 404 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3686859 is about 1920.1195275295. The cubic root of 3686859 is about 154.4847127238.

It can be divided in two parts, 368 and 6859, that added together give a palindrome (7227).

The spelling of 3686859 in words is "three million, six hundred eighty-six thousand, eight hundred fifty-nine".