3957856 has 24 divisors (see below), whose sum is σ = 8905680. Its totient is φ = 1696128.

The previous prime is 3957847. The next prime is 3957857. The reversal of 3957856 is 6587593.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8611 + ... + 9058.

It is an arithmetic number, because the mean of its divisors is an integer number (371070).

Almost surely, 2^3957856 is an apocalyptic number.

It is an amenable number.

3957856 is an abundant number, since it is smaller than the sum of its proper divisors (4947824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3957856 is a wasteful number, since it uses less digits than its factorization.

3957856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17686 (or 17678 counting only the distinct ones).

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

The square root of 3957856 is about 1989.4361010095. The cubic root of 3957856 is about 158.1806404826.

The spelling of 3957856 in words is "three million, nine hundred fifty-seven thousand, eight hundred fifty-six".