3967866 has 40 divisors (see below), whose sum is σ = 10164000. Its totient is φ = 1133352.

The previous prime is 3967841. The next prime is 3967871. The reversal of 3967866 is 6687693.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 616 + ... + 2883.

It is an arithmetic number, because the mean of its divisors is an integer number (254100).

Almost surely, 2^3967866 is an apocalyptic number.

3967866 is an abundant number, since it is smaller than the sum of its proper divisors (6196134).

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

3967866 is a wasteful number, since it uses less digits than its factorization.

3967866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520 (or 3511 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 3967866 is about 1991.9503005848. The cubic root of 3967866 is about 158.3138822520.

The spelling of 3967866 in words is "three million, nine hundred sixty-seven thousand, eight hundred sixty-six".