3865728 has 32 divisors (see below), whose sum is σ = 10269360. Its totient is φ = 1288448.

The previous prime is 3865691. The next prime is 3865733. The reversal of 3865728 is 8275683.

3865728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is an Ulam 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, 4650 + ... + 5417.

Almost surely, 2^3865728 is an apocalyptic number.

It is an amenable number.

3865728 is an abundant number, since it is smaller than the sum of its proper divisors (6403632).

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

3865728 is a wasteful number, since it uses less digits than its factorization.

3865728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10084 (or 10072 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 3865728 is about 1966.1454676600. The cubic root of 3865728 is about 156.9436556575.

The spelling of 3865728 in words is "three million, eight hundred sixty-five thousand, seven hundred twenty-eight".