1728080728 has 32 divisors (see below), whose sum is σ = 3536363520. Its totient is φ = 785124000.

The previous prime is 1728080707. The next prime is 1728080807. The reversal of 1728080728 is 8270808271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295513 + ... + 301303.

It is an arithmetic number, because the mean of its divisors is an integer number (110511360).

Almost surely, 2^1728080728 is an apocalyptic number.

It is an amenable number.

1728080728 is an abundant number, since it is smaller than the sum of its proper divisors (1808282792).

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

1728080728 is a wasteful number, since it uses less digits than its factorization.

1728080728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9199 (or 9195 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 1728080728 is about 41570.1903772403. The cubic root of 1728080728 is about 1200.0186867460.

Adding to 1728080728 its reverse (8270808271), we get a palindrome (9998888999).

The spelling of 1728080728 in words is "one billion, seven hundred twenty-eight million, eighty thousand, seven hundred twenty-eight".