728571220028 has 24 divisors (see below), whose sum is σ = 1279161156672. Its totient is φ = 363097672704.

The previous prime is 728571220021. The next prime is 728571220043. The reversal of 728571220028 is 820022175827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728571220021) 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 7 ways as a sum of consecutive naturals, for example, 2617076 + ... + 2882052.

It is an arithmetic number, because the mean of its divisors is an integer number (53298381528).

Almost surely, 2^728571220028 is an apocalyptic number.

It is an amenable number.

728571220028 is a deficient number, since it is larger than the sum of its proper divisors (550589936644).

728571220028 is a wasteful number, since it uses less digits than its factorization.

728571220028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267221 (or 267219 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 44.

The spelling of 728571220028 in words is "seven hundred twenty-eight billion, five hundred seventy-one million, two hundred twenty thousand, twenty-eight".