3989668 has 12 divisors (see below), whose sum is σ = 7010892. Its totient is φ = 1986560.

The previous prime is 3989663. The next prime is 3989683. The reversal of 3989668 is 8669893.

It can be written as a sum of positive squares in 2 ways, for example, as 3415104 + 574564 = 1848^2 + 758^2 .

It is not an unprimeable number, because it can be changed into a prime (3989663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913 + ... + 2968.

It is an arithmetic number, because the mean of its divisors is an integer number (584241).

Almost surely, 2^3989668 is an apocalyptic number.

It is an amenable number.

3989668 is a deficient number, since it is larger than the sum of its proper divisors (3021224).

3989668 is a wasteful number, since it uses less digits than its factorization.

3989668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142 (or 4140 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 3989668 is about 1997.4153298701. The cubic root of 3989668 is about 158.6033121197.

The spelling of 3989668 in words is "three million, nine hundred eighty-nine thousand, six hundred sixty-eight".