206890 has 16 divisors (see below), whose sum is σ = 394632. Its totient is φ = 77824.

The previous prime is 206887. The next prime is 206897. The reversal of 206890 is 98602.

It can be written as a sum of positive squares in 4 ways, for example, as 175561 + 31329 = 419^2 + 177^2 .

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (206897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439 + ... + 778.

2²⁰⁶⁸⁹⁰ is an apocalyptic number.

206890 is a deficient number, since it is larger than the sum of its proper divisors (187742).

206890 is a wasteful number, since it uses less digits than its factorization.

206890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 206890 is about 454.8516241589. The cubic root of 206890 is about 59.1443368314.

The spelling of 206890 in words is "two hundred six thousand, eight hundred ninety".