208108866 has 64 divisors (see below), whose sum is σ = 516015360. Its totient is φ = 54589440.

The previous prime is 208108847. The next prime is 208108867. The reversal of 208108866 is 668801802.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (208108867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25720 + ... + 32828.

It is an arithmetic number, because the mean of its divisors is an integer number (8062740).

Almost surely, 2^208108866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208108866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258007680).

208108866 is an abundant number, since it is smaller than the sum of its proper divisors (307906494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208108866 is a wasteful number, since it uses less digits than its factorization.

208108866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7179.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 208108866 is about 14425.9788576027. The cubic root of 208108866 is about 592.6025658756.

The spelling of 208108866 in words is "two hundred eight million, one hundred eight thousand, eight hundred sixty-six".