3985189 has 6 divisors (see below), whose sum is σ = 4315506. Its totient is φ = 3678480.

The previous prime is 3985181. The next prime is 3985207. The reversal of 3985189 is 9815893.

It can be written as a sum of positive squares in 3 ways, for example, as 52900 + 3932289 = 230^2 + 1983^2 .

It is not a de Polignac number, because 3985189 - 2³ = 3985181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985181) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 11622 + ... + 11959.

It is an arithmetic number, because the mean of its divisors is an integer number (719251).

Almost surely, 2^3985189 is an apocalyptic number.

It is an amenable number.

3985189 is a deficient number, since it is larger than the sum of its proper divisors (330317).

3985189 is a wasteful number, since it uses less digits than its factorization.

3985189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23607 (or 23594 counting only the distinct ones).

The product of its digits is 77760, while the sum is 43.

The square root of 3985189 is about 1996.2938160501. The cubic root of 3985189 is about 158.5439379029.

The spelling of 3985189 in words is "three million, nine hundred eighty-five thousand, one hundred eighty-nine".