27800243866 has 32 divisors (see below), whose sum is σ = 42834862080. Its totient is φ = 13527195696.

The previous prime is 27800243831. The next prime is 27800243903. The reversal of 27800243866 is 66834200872.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7835905 + ... + 7839451.

It is an arithmetic number, because the mean of its divisors is an integer number (1338589440).

Almost surely, 2^27800243866 is an apocalyptic number.

27800243866 is a deficient number, since it is larger than the sum of its proper divisors (15034618214).

27800243866 is a wasteful number, since it uses less digits than its factorization.

27800243866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258.

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 27800243866 in words is "twenty-seven billion, eight hundred million, two hundred forty-three thousand, eight hundred sixty-six".