3979856 has 20 divisors (see below), whose sum is σ = 7749504. Its totient is φ = 1980000.

The previous prime is 3979849. The next prime is 3979861. The reversal of 3979856 is 6589793.

3979856 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3979856.

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 in 3 ways as a sum of consecutive naturals, for example, 3521 + ... + 4511.

Almost surely, 2^3979856 is an apocalyptic number.

It is an amenable number.

3979856 is a deficient number, since it is larger than the sum of its proper divisors (3769648).

3979856 is a wasteful number, since it uses less digits than its factorization.

3979856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1244 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 3979856 is about 1994.9576436606. The cubic root of 3979856 is about 158.4731849007.

The spelling of 3979856 in words is "three million, nine hundred seventy-nine thousand, eight hundred fifty-six".