1728073689 has 8 divisors (see below), whose sum is σ = 2304335040. Its totient is φ = 1151930736.

The previous prime is 1728073687. The next prime is 1728073717. The reversal of 1728073689 is 9863708271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1728073689 - 2¹ = 1728073687 is a prime.

It is a super-2 number, since 2×1728073689² = 5972477349228137442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1728073687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13372 + ... + 60290.

It is an arithmetic number, because the mean of its divisors is an integer number (288041880).

Almost surely, 2^1728073689 is an apocalyptic number.

It is an amenable number.

1728073689 is a deficient number, since it is larger than the sum of its proper divisors (576261351).

1728073689 is a wasteful number, since it uses less digits than its factorization.

1728073689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59199.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 1728073689 is about 41570.1057131203. The cubic root of 1728073689 is about 1200.0170573964.

The spelling of 1728073689 in words is "one billion, seven hundred twenty-eight million, seventy-three thousand, six hundred eighty-nine".