3686815 has 8 divisors (see below), whose sum is σ = 4826448. Its totient is φ = 2681280.

The previous prime is 3686801. The next prime is 3686833. The reversal of 3686815 is 5186863.

3686815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3686815 - 2¹⁷ = 3555743 is a prime.

3686815 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33462 + ... + 33571.

It is an arithmetic number, because the mean of its divisors is an integer number (603306).

Almost surely, 2^3686815 is an apocalyptic number.

3686815 is a deficient number, since it is larger than the sum of its proper divisors (1139633).

3686815 is a wasteful number, since it uses less digits than its factorization.

3686815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67049.

The product of its digits is 34560, while the sum is 37.

The square root of 3686815 is about 1920.1080698752. The cubic root of 3686815 is about 154.4840981668.

The spelling of 3686815 in words is "three million, six hundred eighty-six thousand, eight hundred fifteen".