206728216 has 8 divisors (see below), whose sum is σ = 387615420. Its totient is φ = 103364104.

The previous prime is 206728199. The next prime is 206728217. The reversal of 206728216 is 612827602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206728217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12920506 + ... + 12920521.

Almost surely, 2^206728216 is an apocalyptic number.

It is an amenable number.

206728216 is a deficient number, since it is larger than the sum of its proper divisors (180887204).

206728216 is a wasteful number, since it uses less digits than its factorization.

206728216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25841033 (or 25841029 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 206728216 is about 14378.0463206932. The cubic root of 206728216 is about 591.2891623332.

The spelling of 206728216 in words is "two hundred six million, seven hundred twenty-eight thousand, two hundred sixteen".