3971856 has 40 divisors (see below), whose sum is σ = 11727424. Its totient is φ = 1134720.

The previous prime is 3971843. The next prime is 3971861. The reversal of 3971856 is 6581793.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5575 + ... + 6246.

Almost surely, 2^3971856 is an apocalyptic number.

It is an amenable number.

3971856 is an abundant number, since it is smaller than the sum of its proper divisors (7755568).

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

3971856 is a wasteful number, since it uses less digits than its factorization.

3971856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11839 (or 11833 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 3971856 is about 1992.9515799437. The cubic root of 3971856 is about 158.3669301436.

The spelling of 3971856 in words is "three million, nine hundred seventy-one thousand, eight hundred fifty-six".