728289322272 has 54 divisors (see below), whose sum is σ = 2071113946083. Its totient is φ = 242758279872.

The previous prime is 728289322217. The next prime is 728289322283. The reversal of 728289322272 is 272223982827.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

728289322272 is a `hidden beast` number, since 7 + 28 + 28 + 9 + 322 + 272 = 666.

It can be written as a sum of positive squares in only one way, i.e., 364144661136 + 364144661136 = 603444^2 + 603444^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=603444.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14457513 + ... + 14507799.

Almost surely, 2^728289322272 is an apocalyptic number.

728289322272 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

728289322272 is an abundant number, since it is smaller than the sum of its proper divisors (1342824623811).

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

728289322272 is an frugal number, since it uses more digits than its factorization.

728289322272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100590 (or 50292 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 728289322272 in words is "seven hundred twenty-eight billion, two hundred eighty-nine million, three hundred twenty-two thousand, two hundred seventy-two".