3975728 has 10 divisors (see below), whose sum is σ = 7703004. Its totient is φ = 1987856.

The previous prime is 3975721. The next prime is 3975749. The reversal of 3975728 is 8275793.

It is not an unprimeable number, because it can be changed into a prime (3975721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124226 + ... + 124257.

Almost surely, 2^3975728 is an apocalyptic number.

It is an amenable number.

3975728 is a deficient number, since it is larger than the sum of its proper divisors (3727276).

3975728 is a wasteful number, since it uses less digits than its factorization.

3975728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248491 (or 248485 counting only the distinct ones).

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

The square root of 3975728 is about 1993.9227668092. The cubic root of 3975728 is about 158.4183752447.

The spelling of 3975728 in words is "three million, nine hundred seventy-five thousand, seven hundred twenty-eight".