3728668 has 12 divisors (see below), whose sum is σ = 6809040. Its totient is φ = 1783232.

The previous prime is 3728633. The next prime is 3728671. The reversal of 3728668 is 8668273.

It is a happy number.

3728668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3¹³ + 7⁴ + 2²¹ + 8³ + 6³ + 6⁴ + 8⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 3728668.

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 in 3 ways as a sum of consecutive naturals, for example, 20173 + ... + 20356.

It is an arithmetic number, because the mean of its divisors is an integer number (567420).

Almost surely, 2^3728668 is an apocalyptic number.

It is an amenable number.

3728668 is a deficient number, since it is larger than the sum of its proper divisors (3080372).

3728668 is a wasteful number, since it uses less digits than its factorization.

3728668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40556 (or 40554 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 3728668 is about 1930.9759190627. The cubic root of 3728668 is about 155.0664716630.

The spelling of 3728668 in words is "three million, seven hundred twenty-eight thousand, six hundred sixty-eight".