208090 has 8 divisors (see below), whose sum is σ = 374580. Its totient is φ = 83232.

The previous prime is 208073. The next prime is 208099. The reversal of 208090 is 90802.

208090 = 202² + 203² + ... + 206².

208090 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 8281 = 447^2 + 91^2 .

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

It is not an unprimeable number, because it can be changed into a prime (208099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10395 + ... + 10414.

2²⁰⁸⁰⁹⁰ is an apocalyptic number.

208090 is a deficient number, since it is larger than the sum of its proper divisors (166490).

208090 is a wasteful number, since it uses less digits than its factorization.

208090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20816.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 208090 is about 456.1688283958. The cubic root of 208090 is about 59.2584657976.

Adding to 208090 its reverse (90802), we get a palindrome (298892).

The spelling of 208090 in words is "two hundred eight thousand, ninety".