3728728 has 8 divisors (see below), whose sum is σ = 6991380. Its totient is φ = 1864360.

The previous prime is 3728719. The next prime is 3728743. The reversal of 3728728 is 8278273.

3728728 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 (8).

It is a congruent 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 as a sum of consecutive naturals, namely, 233038 + ... + 233053.

Almost surely, 2^3728728 is an apocalyptic number.

It is an amenable number.

3728728 is a deficient number, since it is larger than the sum of its proper divisors (3262652).

3728728 is a wasteful number, since it uses less digits than its factorization.

3728728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466097 (or 466093 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 3728728 is about 1930.9914551857. The cubic root of 3728728 is about 155.0673034112.

The spelling of 3728728 in words is "three million, seven hundred twenty-eight thousand, seven hundred twenty-eight".