Adding to 28005301 its reverse (10350082), we get a palindrome (38355383).
It is a happy number.
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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10350082 = 2 ⋅5175041.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
It is a 2610-hyperperfect number.
Almost surely, 228005301 is an apocalyptic number.
It is an amenable number.
28005301 is an equidigital number, since it uses as much as digits as its factorization.
28005301 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10730.
The square root of 28005301 is about 5292.0034958416. The cubic root of 28005301 is about 303.6780590238.
The spelling of 28005301 in words is "twenty-eight million, five thousand, three hundred one".