3685686 has 16 divisors (see below), whose sum is σ = 7391424. Its totient is φ = 1225224.

The previous prime is 3685663. The next prime is 3685687. The reversal of 3685686 is 6865863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2721 + ... + 3843.

It is an arithmetic number, because the mean of its divisors is an integer number (461964).

Almost surely, 2^3685686 is an apocalyptic number.

3685686 is an abundant number, since it is smaller than the sum of its proper divisors (3705738).

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

3685686 is a wasteful number, since it uses less digits than its factorization.

3685686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675.

The product of its digits is 207360, while the sum is 42.

The square root of 3685686 is about 1919.8140534958. The cubic root of 3685686 is about 154.4683275217.

It can be divided in two parts, 3685 and 686, that added together give a triangular number (4371 = T₉₃).

The spelling of 3685686 in words is "three million, six hundred eighty-five thousand, six hundred eighty-six".