208564988 has 12 divisors (see below), whose sum is σ = 367863552. Its totient is φ = 103461120.

The previous prime is 208564963. The next prime is 208565011. The reversal of 208564988 is 889465802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204773 + ... + 205788.

It is an arithmetic number, because the mean of its divisors is an integer number (30655296).

Almost surely, 2^208564988 is an apocalyptic number.

It is an amenable number.

208564988 is a deficient number, since it is larger than the sum of its proper divisors (159298564).

208564988 is a wasteful number, since it uses less digits than its factorization.

208564988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410692 (or 410690 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

The square root of 208564988 is about 14441.7792532638. The cubic root of 208564988 is about 593.0351949400.

The spelling of 208564988 in words is "two hundred eight million, five hundred sixty-four thousand, nine hundred eighty-eight".