208640168 has 32 divisors (see below), whose sum is σ = 440536320. Its totient is φ = 91776000.

The previous prime is 208640143. The next prime is 208640209. The reversal of 208640168 is 861046802.

208640168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35513 + ... + 40968.

It is an arithmetic number, because the mean of its divisors is an integer number (13766760).

Almost surely, 2^208640168 is an apocalyptic number.

It is an amenable number.

208640168 is an abundant number, since it is smaller than the sum of its proper divisors (231896152).

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

208640168 is a wasteful number, since it uses less digits than its factorization.

208640168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76529 (or 76525 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 208640168 is about 14444.3818836252. The cubic root of 208640168 is about 593.1064421652.

The spelling of 208640168 in words is "two hundred eight million, six hundred forty thousand, one hundred sixty-eight".