3785728 has 22 divisors (see below), whose sum is σ = 7569806. Its totient is φ = 1892352.

The previous prime is 3785687. The next prime is 3785753. The reversal of 3785728 is 8275873.

3785728 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2458624 + 1327104 = 1568^2 + 1152^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825 + ... + 2872.

Almost surely, 2^3785728 is an apocalyptic number.

It is an amenable number.

3785728 is a deficient number, since it is larger than the sum of its proper divisors (3784078).

3785728 is an equidigital number, since it uses as much as digits as its factorization.

3785728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717 (or 3699 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 3785728 is about 1945.6947345357. The cubic root of 3785728 is about 155.8534674879.

The spelling of 3785728 in words is "three million, seven hundred eighty-five thousand, seven hundred twenty-eight".