3947884 has 12 divisors (see below), whose sum is σ = 7006608. Its totient is φ = 1946000.

The previous prime is 3947861. The next prime is 3947891. The reversal of 3947884 is 4887493.

It is a self number, because there is not a number n which added to its sum of digits gives 3947884.

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 3 ways as a sum of consecutive naturals, for example, 6667 + ... + 7234.

It is an arithmetic number, because the mean of its divisors is an integer number (583884).

Almost surely, 2^3947884 is an apocalyptic number.

It is an amenable number.

3947884 is a deficient number, since it is larger than the sum of its proper divisors (3058724).

3947884 is a wasteful number, since it uses less digits than its factorization.

3947884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13976 (or 13974 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 3947884 is about 1986.9282825507. The cubic root of 3947884 is about 158.0476809574.

The spelling of 3947884 in words is "three million, nine hundred forty-seven thousand, eight hundred eighty-four".