204806866 has 16 divisors (see below), whose sum is σ = 335403648. Its totient is φ = 93020400.

The previous prime is 204806831. The next prime is 204806869. The reversal of 204806866 is 668608402.

It is not an unprimeable number, because it can be changed into a prime (204806869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32791 + ... + 38533.

It is an arithmetic number, because the mean of its divisors is an integer number (20962728).

Almost surely, 2^204806866 is an apocalyptic number.

204806866 is a deficient number, since it is larger than the sum of its proper divisors (130596782).

204806866 is a wasteful number, since it uses less digits than its factorization.

204806866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 204806866 is about 14311.0749421558. The cubic root of 204806866 is about 589.4516268339.

The spelling of 204806866 in words is "two hundred four million, eight hundred six thousand, eight hundred sixty-six".