208689216 has 28 divisors (see below), whose sum is σ = 552157392. Its totient is φ = 69563008.

The previous prime is 208689209. The next prime is 208689233. The reversal of 208689216 is 612986802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543270 + ... + 543653.

Almost surely, 2^208689216 is an apocalyptic number.

It is an amenable number.

208689216 is an abundant number, since it is smaller than the sum of its proper divisors (343468176).

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

208689216 is a wasteful number, since it uses less digits than its factorization.

208689216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086938 (or 1086928 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 208689216 is about 14446.0796065922. The cubic root of 208689216 is about 593.1529151682.

The spelling of 208689216 in words is "two hundred eight million, six hundred eighty-nine thousand, two hundred sixteen".