3686439 has 8 divisors (see below), whose sum is σ = 4933872. Its totient is φ = 2448320.

The previous prime is 3686411. The next prime is 3686447. The reversal of 3686439 is 9346863.

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 3686439 - 2⁸ = 3686183 is a prime.

It is a d-powerful number, because it can be written as 3⁶ + 6² + 8⁷ + 6⁵ + 4¹⁰ + 3¹² + 9³ .

It is a junction number, because it is equal to n+sod(n) for n = 3686397 and 3686406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686479) 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, 1344 + ... + 3029.

It is an arithmetic number, because the mean of its divisors is an integer number (616734).

Almost surely, 2^3686439 is an apocalyptic number.

3686439 is a deficient number, since it is larger than the sum of its proper divisors (1247433).

3686439 is a wasteful number, since it uses less digits than its factorization.

3686439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657.

The product of its digits is 93312, while the sum is 39.

The square root of 3686439 is about 1920.0101562231. The cubic root of 3686439 is about 154.4788462990.

Subtracting from 3686439 its sum of digits (39), we obtain a square (3686400 = 1920²).

The spelling of 3686439 in words is "three million, six hundred eighty-six thousand, four hundred thirty-nine".