3728785 has 4 divisors (see below), whose sum is σ = 4474548. Its totient is φ = 2983024.

The previous prime is 3728779. The next prime is 3728789. The reversal of 3728785 is 5878273.

3728785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5878273 = 661 ⋅8893.

It can be written as a sum of positive squares in 2 ways, for example, as 1181569 + 2547216 = 1087^2 + 1596^2 .

It is a cyclic number.

It is not a de Polignac number, because 3728785 - 2⁹ = 3728273 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3728789) by changing a digit.

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, 372874 + ... + 372883.

It is an arithmetic number, because the mean of its divisors is an integer number (1118637).

Almost surely, 2^3728785 is an apocalyptic number.

It is an amenable number.

3728785 is a deficient number, since it is larger than the sum of its proper divisors (745763).

3728785 is an equidigital number, since it uses as much as digits as its factorization.

3728785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745762.

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

The square root of 3728785 is about 1931.0062143867. The cubic root of 3728785 is about 155.0680935637.

The spelling of 3728785 in words is "three million, seven hundred twenty-eight thousand, seven hundred eighty-five".