206390 has 8 divisors (see below), whose sum is σ = 371520. Its totient is φ = 82552.

The previous prime is 206383. The next prime is 206399. The reversal of 206390 is 93602.

It is a happy number.

206390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206399) 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, 10310 + ... + 10329.

It is an arithmetic number, because the mean of its divisors is an integer number (46440).

2²⁰⁶³⁹⁰ is an apocalyptic number.

206390 is a deficient number, since it is larger than the sum of its proper divisors (165130).

206390 is a wasteful number, since it uses less digits than its factorization.

206390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20646.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 206390 is about 454.3016618944. The cubic root of 206390 is about 59.0966528396.

Adding to 206390 its reverse (93602), we get a palindrome (299992).

The spelling of 206390 in words is "two hundred six thousand, three hundred ninety".