3971868 has 24 divisors (see below), whose sum is σ = 9300480. Its totient is φ = 1319280.

The previous prime is 3971861. The next prime is 3971879. The reversal of 3971868 is 8681793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5403 + ... + 6093.

It is an arithmetic number, because the mean of its divisors is an integer number (387520).

Almost surely, 2^3971868 is an apocalyptic number.

It is an amenable number.

3971868 is an abundant number, since it is smaller than the sum of its proper divisors (5328612).

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

3971868 is a wasteful number, since it uses less digits than its factorization.

3971868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1175 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 3971868 is about 1992.9545905514. The cubic root of 3971868 is about 158.3670896325.

The spelling of 3971868 in words is "three million, nine hundred seventy-one thousand, eight hundred sixty-eight".