208728265 has 8 divisors (see below), whose sum is σ = 251399808. Its totient is φ = 166365360.

The previous prime is 208728263. The next prime is 208728293. The reversal of 208728265 is 562827802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 208728265 - 2¹ = 208728263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208728263) by changing a digit.

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, 75667 + ... + 78376.

It is an arithmetic number, because the mean of its divisors is an integer number (31424976).

Almost surely, 2^208728265 is an apocalyptic number.

It is an amenable number.

208728265 is a deficient number, since it is larger than the sum of its proper divisors (42671543).

208728265 is a wasteful number, since it uses less digits than its factorization.

208728265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154319.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 208728265 is about 14447.4310865288. The cubic root of 208728265 is about 593.1899089080.

The spelling of 208728265 in words is "two hundred eight million, seven hundred twenty-eight thousand, two hundred sixty-five".