1728445018272 has 480 divisors, whose sum is σ = 5542372491264. Its totient is φ = 471041625600.

The previous prime is 1728445018271. The next prime is 1728445018297. The reversal of 1728445018272 is 2728105448271.

It is not an unprimeable number, because it can be changed into a prime (1728445018271) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 507319993 + ... + 507323399.

Almost surely, 2^{1728445018272} is an apocalyptic number.

1728445018272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1728445018272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2771186245632).

1728445018272 is an abundant number, since it is smaller than the sum of its proper divisors (3813927472992).

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

1728445018272 is an equidigital number, since it uses as much as digits as its factorization.

1728445018272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 51.

The spelling of 1728445018272 in words is "one trillion, seven hundred twenty-eight billion, four hundred forty-five million, eighteen thousand, two hundred seventy-two".