3971984 has 20 divisors (see below), whose sum is σ = 7748016. Its totient is φ = 1972512.

The previous prime is 3971983. The next prime is 3971993. The reversal of 3971984 is 4891793.

It is a happy number.

3971984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3971983) by changing a digit.

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, 1847 + ... + 3369.

Almost surely, 2^3971984 is an apocalyptic number.

It is an amenable number.

3971984 is a deficient number, since it is larger than the sum of its proper divisors (3776032).

3971984 is a wasteful number, since it uses less digits than its factorization.

3971984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694 (or 1688 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 3971984 is about 1992.9836928585. The cubic root of 3971984 is about 158.3686313423.

The spelling of 3971984 in words is "three million, nine hundred seventy-one thousand, nine hundred eighty-four".