3681688 has 8 divisors (see below), whose sum is σ = 6903180. Its totient is φ = 1840840.

The previous prime is 3681683. The next prime is 3681697. The reversal of 3681688 is 8861863.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3681688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230098 + ... + 230113.

Almost surely, 2^3681688 is an apocalyptic number.

It is an amenable number.

3681688 is a deficient number, since it is larger than the sum of its proper divisors (3221492).

3681688 is a wasteful number, since it uses less digits than its factorization.

3681688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460217 (or 460213 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 3681688 is about 1918.7725242978. The cubic root of 3681688 is about 154.4124548107.

The spelling of 3681688 in words is "three million, six hundred eighty-one thousand, six hundred eighty-eight".