1728688 has 20 divisors (see below), whose sum is σ = 3607408. Its totient is φ = 797760.

The previous prime is 1728659. The next prime is 1728689. The reversal of 1728688 is 8868271.

It is a self number, because there is not a number n which added to its sum of digits gives 1728688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728689) 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, 3948 + ... + 4363.

2^1728688 is an apocalyptic number.

It is an amenable number.

1728688 is an abundant number, since it is smaller than the sum of its proper divisors (1878720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1728688 is a wasteful number, since it uses less digits than its factorization.

1728688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8332 (or 8326 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 1728688 is about 1314.7958016361. The cubic root of 1728688 is about 120.0159238128.

The spelling of 1728688 in words is "one million, seven hundred twenty-eight thousand, six hundred eighty-eight".