3871856 has 20 divisors (see below), whose sum is σ = 7588800. Its totient is φ = 1913472.

The previous prime is 3871841. The next prime is 3871871. The reversal of 3871856 is 6581783.

It is an interprime number because it is at equal distance from previous prime (3871841) and next prime (3871871).

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65 + ... + 2783.

It is an arithmetic number, because the mean of its divisors is an integer number (379440).

Almost surely, 2^3871856 is an apocalyptic number.

It is an amenable number.

3871856 is a deficient number, since it is larger than the sum of its proper divisors (3716944).

3871856 is a wasteful number, since it uses less digits than its factorization.

3871856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2810 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 3871856 is about 1967.7032296563. The cubic root of 3871856 is about 157.0265415525.

The spelling of 3871856 in words is "three million, eight hundred seventy-one thousand, eight hundred fifty-six".