3957855 has 48 divisors (see below), whose sum is σ = 7426944. Its totient is φ = 1784320.

The previous prime is 3957847. The next prime is 3957857. The reversal of 3957855 is 5587593.

It is not a de Polignac number, because 3957855 - 2³ = 3957847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3957857) 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 47 ways as a sum of consecutive naturals, for example, 47644 + ... + 47726.

It is an arithmetic number, because the mean of its divisors is an integer number (154728).

Almost surely, 2^3957855 is an apocalyptic number.

3957855 is a deficient number, since it is larger than the sum of its proper divisors (3469089).

3957855 is a wasteful number, since it uses less digits than its factorization.

3957855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 119 counting only the distinct ones).

The product of its digits is 189000, while the sum is 42.

The square root of 3957855 is about 1989.4358496820. The cubic root of 3957855 is about 158.1806271605.

The spelling of 3957855 in words is "three million, nine hundred fifty-seven thousand, eight hundred fifty-five".