3686645 has 8 divisors (see below), whose sum is σ = 4442040. Its totient is φ = 2937280.

The previous prime is 3686629. The next prime is 3686651. The reversal of 3686645 is 5466863.

It can be written as a sum of positive squares in 4 ways, for example, as 7921 + 3678724 = 89^2 + 1918^2 .

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

It is not a de Polignac number, because 3686645 - 2⁴ = 3686629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3686599 and 3686608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26 + ... + 2715.

It is an arithmetic number, because the mean of its divisors is an integer number (555255).

Almost surely, 2^3686645 is an apocalyptic number.

It is an amenable number.

3686645 is a deficient number, since it is larger than the sum of its proper divisors (755395).

3686645 is a wasteful number, since it uses less digits than its factorization.

3686645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015.

The product of its digits is 103680, while the sum is 38.

The square root of 3686645 is about 1920.0638010233. The cubic root of 3686645 is about 154.4817236963.

The spelling of 3686645 in words is "three million, six hundred eighty-six thousand, six hundred forty-five".