728945308801 has 4 divisors (see below), whose sum is σ = 731289184704. Its totient is φ = 726601432900.

The previous prime is 728945308727. The next prime is 728945308829. The reversal of 728945308801 is 108803549827.

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.

It is a cyclic number.

It is not a de Polignac number, because 728945308801 - 2¹¹ = 728945306753 is a prime.

It is a super-2 number, since 2×728945308801² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728945308891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171937485 + ... + 1171938106.

It is an arithmetic number, because the mean of its divisors is an integer number (182822296176).

Almost surely, 2^728945308801 is an apocalyptic number.

It is an amenable number.

728945308801 is a deficient number, since it is larger than the sum of its proper divisors (2343875903).

728945308801 is a wasteful number, since it uses less digits than its factorization.

728945308801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343875902.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 728945308801 in words is "seven hundred twenty-eight billion, nine hundred forty-five million, three hundred eight thousand, eight hundred one".