3686389 has 4 divisors (see below), whose sum is σ = 4213024. Its totient is φ = 3159756.

The previous prime is 3686387. The next prime is 3686401. The reversal of 3686389 is 9836863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3686389 - 2¹ = 3686387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263307 + ... + 263320.

It is an arithmetic number, because the mean of its divisors is an integer number (1053256).

Almost surely, 2^3686389 is an apocalyptic number.

It is an amenable number.

3686389 is a deficient number, since it is larger than the sum of its proper divisors (526635).

3686389 is an equidigital number, since it uses as much as digits as its factorization.

3686389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526634.

The product of its digits is 186624, while the sum is 43.

The square root of 3686389 is about 1919.9971354145. The cubic root of 3686389 is about 154.4781478854.

The spelling of 3686389 in words is "three million, six hundred eighty-six thousand, three hundred eighty-nine".