3920686 has 24 divisors (see below), whose sum is σ = 7465176. Its totient is φ = 1527120.

The previous prime is 3920681. The next prime is 3920687. The reversal of 3920686 is 6860293.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 741 + ... + 2896.

It is an arithmetic number, because the mean of its divisors is an integer number (311049).

Almost surely, 2^3920686 is an apocalyptic number.

3920686 is a deficient number, since it is larger than the sum of its proper divisors (3544490).

3920686 is a wasteful number, since it uses less digits than its factorization.

3920686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664 (or 3657 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 3920686 is about 1980.0722209051. The cubic root of 3920686 is about 157.6839004166.

The spelling of 3920686 in words is "three million, nine hundred twenty thousand, six hundred eighty-six".