3900686 has 4 divisors (see below), whose sum is σ = 5851032. Its totient is φ = 1950342.

The previous prime is 3900679. The next prime is 3900691. The reversal of 3900686 is 6860093.

It is a happy number.

3900686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975170 + ... + 975173.

It is an arithmetic number, because the mean of its divisors is an integer number (1462758).

Almost surely, 2^3900686 is an apocalyptic number.

3900686 is a deficient number, since it is larger than the sum of its proper divisors (1950346).

3900686 is a wasteful number, since it uses less digits than its factorization.

3900686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950345.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 3900686 is about 1975.0154429776. The cubic root of 3900686 is about 157.4153202314.

The spelling of 3900686 in words is "three million, nine hundred thousand, six hundred eighty-six".