3957844 has 24 divisors (see below), whose sum is σ = 7606368. Its totient is φ = 1787040.

The previous prime is 3957839. The next prime is 3957847. The reversal of 3957844 is 4487593.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3957797 and 3957806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3957847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12739 + ... + 13045.

It is an arithmetic number, because the mean of its divisors is an integer number (316932).

Almost surely, 2^3957844 is an apocalyptic number.

It is an amenable number.

3957844 is a deficient number, since it is larger than the sum of its proper divisors (3648524).

3957844 is a wasteful number, since it uses less digits than its factorization.

3957844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 613 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 3957844 is about 1989.4330850773. The cubic root of 3957844 is about 158.1804806174.

The spelling of 3957844 in words is "three million, nine hundred fifty-seven thousand, eight hundred forty-four".