208868688 has 120 divisors (see below), whose sum is σ = 671082048. Its totient is φ = 59406336.

The previous prime is 208868683. The next prime is 208868711. The reversal of 208868688 is 886868802.

208868688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×208868688² = 87252257653682688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208868683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355531 + ... + 356117.

Almost surely, 2^208868688 is an apocalyptic number.

208868688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208868688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335541024).

208868688 is an abundant number, since it is smaller than the sum of its proper divisors (462213360).

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

208868688 is a wasteful number, since it uses less digits than its factorization.

208868688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 54.

The square root of 208868688 is about 14452.2900607482. The cubic root of 208868688 is about 593.3229029293.

The spelling of 208868688 in words is "two hundred eight million, eight hundred sixty-eight thousand, six hundred eighty-eight".