3686648 has 32 divisors (see below), whose sum is σ = 8088960. Its totient is φ = 1542240.

The previous prime is 3686629. The next prime is 3686651. The reversal of 3686648 is 8466863.

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, 1643 + ... + 3173.

It is an arithmetic number, because the mean of its divisors is an integer number (252780).

Almost surely, 2^3686648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3686648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4044480).

3686648 is an abundant number, since it is smaller than the sum of its proper divisors (4402312).

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

3686648 is a wasteful number, since it uses less digits than its factorization.

3686648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587 (or 1583 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 3686648 is about 1920.0645822472. The cubic root of 3686648 is about 154.4817655994.

It can be divided in two parts, 3686 and 648, that added together give a palindrome (4334).

The spelling of 3686648 in words is "three million, six hundred eighty-six thousand, six hundred forty-eight".