206408 has 8 divisors (see below), whose sum is σ = 387030. Its totient is φ = 103200.

The previous prime is 206407. The next prime is 206411. The reversal of 206408 is 804602.

It can be written as a sum of positive squares in only one way, i.e., 174724 + 31684 = 418^2 + 178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 206408.

It is not an unprimeable number, because it can be changed into a prime (206407) 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 as a sum of consecutive naturals, namely, 12893 + ... + 12908.

2²⁰⁶⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

206408 is a deficient number, since it is larger than the sum of its proper divisors (180622).

206408 is a wasteful number, since it uses less digits than its factorization.

206408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25807 (or 25803 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 206408 is about 454.3214720878. The cubic root of 206408 is about 59.0983707988.

It can be divided in two parts, 206 and 408, that multiplied together give a palindrome (84048).

The spelling of 206408 in words is "two hundred six thousand, four hundred eight".