1728723268 has 24 divisors (see below), whose sum is σ = 3231583992. Its totient is φ = 806313984.

The previous prime is 1728723239. The next prime is 1728723289. The reversal of 1728723268 is 8623278271.

It can be written as a sum of positive squares in 4 ways, for example, as 380952324 + 1347770944 = 19518^2 + 36712^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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, 104805 + ... + 120172.

It is an arithmetic number, because the mean of its divisors is an integer number (134649333).

Almost surely, 2^1728723268 is an apocalyptic number.

It is an amenable number.

1728723268 is a deficient number, since it is larger than the sum of its proper divisors (1502860724).

1728723268 is a wasteful number, since it uses less digits than its factorization.

1728723268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225111 (or 225109 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 1728723268 is about 41577.9180334947. The cubic root of 1728723268 is about 1200.1673997948.

The spelling of 1728723268 in words is "one billion, seven hundred twenty-eight million, seven hundred twenty-three thousand, two hundred sixty-eight".