208885 has 4 divisors (see below), whose sum is σ = 250668. Its totient is φ = 167104.

The previous prime is 208877. The next prime is 208889. The reversal of 208885 is 588802.

208885 = 140² + 141² + ... + 149².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77841 + 131044 = 279^2 + 362^2 .

It is a cyclic number.

It is not a de Polignac number, because 208885 - 2³ = 208877 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208889) 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 3 ways as a sum of consecutive naturals, for example, 20884 + ... + 20893.

It is an arithmetic number, because the mean of its divisors is an integer number (62667).

2²⁰⁸⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

208885 is a deficient number, since it is larger than the sum of its proper divisors (41783).

208885 is an equidigital number, since it uses as much as digits as its factorization.

208885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41782.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 208885 is about 457.0393856113. The cubic root of 208885 is about 59.3338348090. Note that the first 3 decimals are identical.

The spelling of 208885 in words is "two hundred eight thousand, eight hundred eighty-five".