It is a strong prime.
It is a cyclic number.
It is a congruent number.
Almost surely, 228758056060821 is an apocalyptic number.
It is an amenable number.
28758056060821 is an equidigital number, since it uses as much as digits as its factorization.
28758056060821 is an evil number, because the sum of its binary digits is even.
The spelling of 28758056060821 in words is "twenty-eight trillion, seven hundred fifty-eight billion, fifty-six million, sixty thousand, eight hundred twenty-one".