3957728 has 24 divisors (see below), whose sum is σ = 7836192. Its totient is φ = 1967616.

The previous prime is 3957713. The next prime is 3957743. The reversal of 3957728 is 8277593.

3957728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3957713) and next prime (3957743).

It is a super-2 number, since 2×3957728² = 31327221843968, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10601 + ... + 10967.

It is an arithmetic number, because the mean of its divisors is an integer number (326508).

Almost surely, 2^3957728 is an apocalyptic number.

It is an amenable number.

3957728 is a deficient number, since it is larger than the sum of its proper divisors (3878464).

3957728 is a wasteful number, since it uses less digits than its factorization.

3957728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 706 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 3957728 is about 1989.4039308295. The cubic root of 3957728 is about 158.1789352377.

The spelling of 3957728 in words is "three million, nine hundred fifty-seven thousand, seven hundred twenty-eight".