1728668 has 6 divisors (see below), whose sum is σ = 3025176. Its totient is φ = 864332.

The previous prime is 1728659. The next prime is 1728689. The reversal of 1728668 is 8668271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216080 + ... + 216087.

It is an arithmetic number, because the mean of its divisors is an integer number (504196).

2^1728668 is an apocalyptic number.

It is an amenable number.

1728668 is a deficient number, since it is larger than the sum of its proper divisors (1296508).

1728668 is a wasteful number, since it uses less digits than its factorization.

1728668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432171 (or 432169 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 1728668 is about 1314.7881958703. The cubic root of 1728668 is about 120.0154609709.

The spelling of 1728668 in words is "one million, seven hundred twenty-eight thousand, six hundred sixty-eight".