208542866 has 16 divisors (see below), whose sum is σ = 357938880. Its totient is φ = 89266320.

The previous prime is 208542847. The next prime is 208542871. The reversal of 208542866 is 668245802.

208542866 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

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, 3356 + ... + 20696.

It is an arithmetic number, because the mean of its divisors is an integer number (22371180).

Almost surely, 2^208542866 is an apocalyptic number.

208542866 is a deficient number, since it is larger than the sum of its proper divisors (149396014).

208542866 is a wasteful number, since it uses less digits than its factorization.

208542866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18209.

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 208542866 is about 14441.0133300956. The cubic root of 208542866 is about 593.0142269137.

The spelling of 208542866 in words is "two hundred eight million, five hundred forty-two thousand, eight hundred sixty-six".