3684865 has 4 divisors (see below), whose sum is σ = 4421844. Its totient is φ = 2947888.

The previous prime is 3684859. The next prime is 3684871. The reversal of 3684865 is 5684863.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3684859) and next prime (3684871).

It can be written as a sum of positive squares in 2 ways, for example, as 1238769 + 2446096 = 1113^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 3684865 - 2⁵ = 3684833 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368482 + ... + 368491.

It is an arithmetic number, because the mean of its divisors is an integer number (1105461).

Almost surely, 2^3684865 is an apocalyptic number.

It is an amenable number.

3684865 is a deficient number, since it is larger than the sum of its proper divisors (736979).

3684865 is an equidigital number, since it uses as much as digits as its factorization.

3684865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736978.

The product of its digits is 138240, while the sum is 40.

The square root of 3684865 is about 1919.6002187956. The cubic root of 3684865 is about 154.4568572088.

The spelling of 3684865 in words is "three million, six hundred eighty-four thousand, eight hundred sixty-five".