206720256 has 36 divisors (see below), whose sum is σ = 550179392. Its totient is φ = 68906496.

The previous prime is 206720243. The next prime is 206720257. The reversal of 206720256 is 652027602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206720257) 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, 133816 + ... + 135351.

Almost surely, 2^206720256 is an apocalyptic number.

It is an amenable number.

206720256 is an abundant number, since it is smaller than the sum of its proper divisors (343459136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206720256 is an equidigital number, since it uses as much as digits as its factorization.

206720256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269186 (or 269172 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 206720256 is about 14377.7695071245. The cubic root of 206720256 is about 591.2815731061.

Adding to 206720256 its reverse (652027602), we get a palindrome (858747858).

It can be divided in two parts, 20 and 6720256, that added together give a palindrome (6720276).

The spelling of 206720256 in words is "two hundred six million, seven hundred twenty thousand, two hundred fifty-six".