3686646 has 32 divisors (see below), whose sum is σ = 7885440. Its totient is φ = 1145664.

The previous prime is 3686629. The next prime is 3686651. The reversal of 3686646 is 6466863.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8101 + ... + 8543.

It is an arithmetic number, because the mean of its divisors is an integer number (246420).

Almost surely, 2^3686646 is an apocalyptic number.

3686646 is an abundant number, since it is smaller than the sum of its proper divisors (4198794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3686646 is a wasteful number, since it uses less digits than its factorization.

3686646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540.

The product of its digits is 124416, while the sum is 39.

The square root of 3686646 is about 1920.0640614313. The cubic root of 3686646 is about 154.4817376640.

The spelling of 3686646 in words is "three million, six hundred eighty-six thousand, six hundred forty-six".