28021350566 has 16 divisors (see below), whose sum is σ = 45885035520. Its totient is φ = 12728111880.

The previous prime is 28021350521. The next prime is 28021350569. The reversal of 28021350566 is 66505312082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28021350569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410906 + ... + 474221.

It is an arithmetic number, because the mean of its divisors is an integer number (2867814720).

Almost surely, 2^28021350566 is an apocalyptic number.

28021350566 is a deficient number, since it is larger than the sum of its proper divisors (17863684954).

28021350566 is a wasteful number, since it uses less digits than its factorization.

28021350566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886579.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 28021350566 in words is "twenty-eight billion, twenty-one million, three hundred fifty thousand, five hundred sixty-six".