1729728001 has 4 divisors (see below), whose sum is σ = 1729811632. Its totient is φ = 1729644372.

The previous prime is 1729727999. The next prime is 1729728047. The reversal of 1729728001 is 1008279271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1729728001 - 2¹ = 1729727999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1729728071) 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, 14410 + ... + 60556.

It is an arithmetic number, because the mean of its divisors is an integer number (432452908).

Almost surely, 2^1729728001 is an apocalyptic number.

It is an amenable number.

1729728001 is a deficient number, since it is larger than the sum of its proper divisors (83631).

1729728001 is an equidigital number, since it uses as much as digits as its factorization.

1729728001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83630.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 1729728001 is about 41589.9988098100. The cubic root of 1729728001 is about 1200.3998669720.

The spelling of 1729728001 in words is "one billion, seven hundred twenty-nine million, seven hundred twenty-eight thousand, one".