3989816 has 32 divisors (see below), whose sum is σ = 7776000. Its totient is φ = 1918176.

The previous prime is 3989809. The next prime is 3989831. The reversal of 3989816 is 6189893.

3989816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 37235 + ... + 37341.

It is an arithmetic number, because the mean of its divisors is an integer number (243000).

Almost surely, 2^3989816 is an apocalyptic number.

It is an amenable number.

3989816 is a deficient number, since it is larger than the sum of its proper divisors (3786184).

3989816 is a wasteful number, since it uses less digits than its factorization.

3989816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 247 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 3989816 is about 1997.4523774048. The cubic root of 3989816 is about 158.6052732687.

The spelling of 3989816 in words is "three million, nine hundred eighty-nine thousand, eight hundred sixteen".