3965128 has 16 divisors (see below), whose sum is σ = 7519500. Its totient is φ = 1959936.

The previous prime is 3965123. The next prime is 3965147. The reversal of 3965128 is 8215693.

It can be written as a sum of positive squares in 2 ways, for example, as 3526884 + 438244 = 1878^2 + 662^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3965093 and 3965102.

It is not an unprimeable number, because it can be changed into a prime (3965123) 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, 2073 + ... + 3496.

Almost surely, 2^3965128 is an apocalyptic number.

It is an amenable number.

3965128 is a deficient number, since it is larger than the sum of its proper divisors (3554372).

3965128 is a wasteful number, since it uses less digits than its factorization.

3965128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664 (or 5660 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 3965128 is about 1991.2629158401. The cubic root of 3965128 is about 158.2774593863.

The spelling of 3965128 in words is "three million, nine hundred sixty-five thousand, one hundred twenty-eight".