3971996 has 24 divisors (see below), whose sum is σ = 8131200. Its totient is φ = 1662192.

The previous prime is 3971993. The next prime is 3972011. The reversal of 3971996 is 6991793.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446 + ... + 2853.

It is an arithmetic number, because the mean of its divisors is an integer number (338800).

Almost surely, 2^3971996 is an apocalyptic number.

It is an amenable number.

3971996 is an abundant number, since it is smaller than the sum of its proper divisors (4159204).

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

3971996 is a wasteful number, since it uses less digits than its factorization.

3971996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353 (or 3351 counting only the distinct ones).

The product of its digits is 91854, while the sum is 44.

The square root of 3971996 is about 1992.9867034178. The cubic root of 3971996 is about 158.3687908278.

The spelling of 3971996 in words is "three million, nine hundred seventy-one thousand, nine hundred ninety-six".