1728678368 has 24 divisors (see below), whose sum is σ = 3582459720. Its totient is φ = 818847360.

The previous prime is 1728678361. The next prime is 1728678397. The reversal of 1728678368 is 8638768271.

It is a happy number.

It is a super-2 number, since 2×1728678368² = 5976657799982286848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728678361) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1421003 + ... + 1422218.

It is an arithmetic number, because the mean of its divisors is an integer number (149269155).

Almost surely, 2^1728678368 is an apocalyptic number.

It is an amenable number.

1728678368 is an abundant number, since it is smaller than the sum of its proper divisors (1853781352).

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

1728678368 is a wasteful number, since it uses less digits than its factorization.

1728678368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843250 (or 2843242 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 56.

The square root of 1728678368 is about 41577.3780799126. The cubic root of 1728678368 is about 1200.1570090855.

The spelling of 1728678368 in words is "one billion, seven hundred twenty-eight million, six hundred seventy-eight thousand, three hundred sixty-eight".