1728200001 has 32 divisors (see below), whose sum is σ = 2537837568. Its totient is φ = 1037407040.

The previous prime is 1728199969. The next prime is 1728200017. The reversal of 1728200001 is 1000028271.

It is a cyclic number.

It is not a de Polignac number, because 1728200001 - 2⁵ = 1728199969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1728200041) 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 31 ways as a sum of consecutive naturals, for example, 3069346 + ... + 3069908.

It is an arithmetic number, because the mean of its divisors is an integer number (79307424).

Almost surely, 2^1728200001 is an apocalyptic number.

1728200001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1728200001 is a deficient number, since it is larger than the sum of its proper divisors (809637567).

1728200001 is a wasteful number, since it uses less digits than its factorization.

1728200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1728200001 is about 41571.6249501989. The cubic root of 1728200001 is about 1200.0462947418.

Adding to 1728200001 its reverse (1000028271), we get a palindrome (2728228272).

The spelling of 1728200001 in words is "one billion, seven hundred twenty-eight million, two hundred thousand, one".