208391768 has 16 divisors (see below), whose sum is σ = 420791280. Its totient is φ = 96180768.

The previous prime is 208391761. The next prime is 208391773. The reversal of 208391768 is 867193802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208391761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001780 + ... + 1001987.

It is an arithmetic number, because the mean of its divisors is an integer number (26299455).

Almost surely, 2^208391768 is an apocalyptic number.

It is an amenable number.

208391768 is an abundant number, since it is smaller than the sum of its proper divisors (212399512).

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

208391768 is a wasteful number, since it uses less digits than its factorization.

208391768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003786 (or 2003782 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 208391768 is about 14435.7808240497. The cubic root of 208391768 is about 592.8709711337.

The spelling of 208391768 in words is "two hundred eight million, three hundred ninety-one thousand, seven hundred sixty-eight".