3728 has 10 divisors (see below), whose sum is σ = 7254. Its totient is φ = 1856.

The previous prime is 3727. The next prime is 3733. The reversal of 3728 is 8273.

It can be written as a sum of positive squares in only one way, i.e., 2704 + 1024 = 52^2 + 32^2 .

It is a plaindrome in base 11 and base 15.

It is a nialpdrome in base 4, base 8 and base 16.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (3727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101 + ... + 132.

It is an amenable number.

3728 is a deficient number, since it is larger than the sum of its proper divisors (3526).

3728 is a wasteful number, since it uses less digits than its factorization.

3728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 235 counting only the distinct ones).

The product of its digits is 336, while the sum is 20.

The square root of 3728 is about 61.0573500899. The cubic root of 3728 is about 15.5057210931.

The spelling of 3728 in words is "three thousand, seven hundred twenty-eight".