3957685 has 16 divisors (see below), whose sum is σ = 5089392. Its totient is φ = 2944000.

The previous prime is 3957683. The next prime is 3957691. The reversal of 3957685 is 5867593.

It can be written as a sum of positive squares in 8 ways, for example, as 298116 + 3659569 = 546^2 + 1913^2 .

It is not a de Polignac number, because 3957685 - 2¹ = 3957683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3957683) 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 15 ways as a sum of consecutive naturals, for example, 8355 + ... + 8815.

It is an arithmetic number, because the mean of its divisors is an integer number (318087).

Almost surely, 2^3957685 is an apocalyptic number.

It is an amenable number.

3957685 is a deficient number, since it is larger than the sum of its proper divisors (1131707).

3957685 is a wasteful number, since it uses less digits than its factorization.

3957685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584.

The product of its digits is 226800, while the sum is 43.

The square root of 3957685 is about 1989.3931235430. The cubic root of 3957685 is about 158.1783623738.

The spelling of 3957685 in words is "three million, nine hundred fifty-seven thousand, six hundred eighty-five".