208897668 has 72 divisors (see below), whose sum is σ = 605317440. Its totient is φ = 59503680.

The previous prime is 208897651. The next prime is 208897669. The reversal of 208897668 is 866798802.

It is not an unprimeable number, because it can be changed into a prime (208897669) 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, 96963 + ... + 99093.

Almost surely, 2^208897668 is an apocalyptic number.

208897668 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 208897668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302658720).

208897668 is an abundant number, since it is smaller than the sum of its proper divisors (396419772).

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

208897668 is a wasteful number, since it uses less digits than its factorization.

208897668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2532 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 208897668 is about 14453.2926352441. The cubic root of 208897668 is about 593.3503423423.

The spelling of 208897668 in words is "two hundred eight million, eight hundred ninety-seven thousand, six hundred sixty-eight".