28821342490728 has 48 divisors (see below), whose sum is σ = 74623630579680. Its totient is φ = 9275834358336.

The previous prime is 28821342490697. The next prime is 28821342490777. The reversal of 28821342490728 is 82709424312882.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 713944900 + ... + 713985267.

It is an arithmetic number, because the mean of its divisors is an integer number (1554658970410).

Almost surely, 2^{28821342490728} is an apocalyptic number.

It is an amenable number.

28821342490728 is an abundant number, since it is smaller than the sum of its proper divisors (45802288088952).

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

28821342490728 is a wasteful number, since it uses less digits than its factorization.

28821342490728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427930234 (or 1427930201 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 60.

The spelling of 28821342490728 in words is "twenty-eight trillion, eight hundred twenty-one billion, three hundred forty-two million, four hundred ninety thousand, seven hundred twenty-eight".