208716728 has 32 divisors (see below), whose sum is σ = 431084160. Its totient is φ = 93946080.

The previous prime is 208716719. The next prime is 208716731. The reversal of 208716728 is 827617802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450 + ... + 20577.

It is an arithmetic number, because the mean of its divisors is an integer number (13471380).

Almost surely, 2^208716728 is an apocalyptic number.

It is an amenable number.

208716728 is an abundant number, since it is smaller than the sum of its proper divisors (222367432).

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

208716728 is a wasteful number, since it uses less digits than its factorization.

208716728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23147 (or 23143 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 208716728 is about 14447.0318058763. The cubic root of 208716728 is about 593.1789796135.

The spelling of 208716728 in words is "two hundred eight million, seven hundred sixteen thousand, seven hundred twenty-eight".