208720338 has 16 divisors (see below), whose sum is σ = 421574976. Its totient is φ = 68884400.

The previous prime is 208720327. The next prime is 208720357. The reversal of 208720338 is 833027802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 208720299 and 208720308.

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, 171606 + ... + 172817.

It is an arithmetic number, because the mean of its divisors is an integer number (26348436).

Almost surely, 2^208720338 is an apocalyptic number.

208720338 is an abundant number, since it is smaller than the sum of its proper divisors (212854638).

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

208720338 is a wasteful number, since it uses less digits than its factorization.

208720338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344529.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 208720338 is about 14447.1567444947. The cubic root of 208720338 is about 593.1823995019.

The spelling of 208720338 in words is "two hundred eight million, seven hundred twenty thousand, three hundred thirty-eight".