208541090 has 8 divisors (see below), whose sum is σ = 375373980. Its totient is φ = 83416432.

The previous prime is 208541077. The next prime is 208541143. The reversal of 208541090 is 90145802.

It can be written as a sum of positive squares in 2 ways, for example, as 190909489 + 17631601 = 13817^2 + 4199^2 .

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

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 10427045 + ... + 10427064.

Almost surely, 2^208541090 is an apocalyptic number.

208541090 is a deficient number, since it is larger than the sum of its proper divisors (166832890).

208541090 is a wasteful number, since it uses less digits than its factorization.

208541090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20854116.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 208541090 is about 14440.9518384350. The cubic root of 208541090 is about 593.0125434928.

Adding to 208541090 its reverse (90145802), we get a palindrome (298686892).

The spelling of 208541090 in words is "two hundred eight million, five hundred forty-one thousand, ninety".