3966728 has 16 divisors (see below), whose sum is σ = 7507500. Its totient is φ = 1964736.

The previous prime is 3966727. The next prime is 3966761. The reversal of 3966728 is 8276693.

It can be written as a sum of positive squares in 2 ways, for example, as 3771364 + 195364 = 1942^2 + 442^2 .

It is not an unprimeable number, because it can be changed into a prime (3966727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403 + ... + 3146.

Almost surely, 2^3966728 is an apocalyptic number.

It is an amenable number.

3966728 is a deficient number, since it is larger than the sum of its proper divisors (3540772).

3966728 is a wasteful number, since it uses less digits than its factorization.

3966728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664 (or 4660 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 3966728 is about 1991.6646304034. The cubic root of 3966728 is about 158.2987457845.

The spelling of 3966728 in words is "three million, nine hundred sixty-six thousand, seven hundred twenty-eight".