206642256 has 40 divisors (see below), whose sum is σ = 535888320. Its totient is φ = 68614656.

The previous prime is 206642251. The next prime is 206642257. The reversal of 206642256 is 652246602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206642251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4440 + ... + 20808.

It is an arithmetic number, because the mean of its divisors is an integer number (13397208).

Almost surely, 2^206642256 is an apocalyptic number.

It is an amenable number.

206642256 is an abundant number, since it is smaller than the sum of its proper divisors (329246064).

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

206642256 is a wasteful number, since it uses less digits than its factorization.

206642256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16643 (or 16637 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 206642256 is about 14375.0567303228. The cubic root of 206642256 is about 591.2071959978.

Adding to 206642256 its reverse (652246602), we get a palindrome (858888858).

The spelling of 206642256 in words is "two hundred six million, six hundred forty-two thousand, two hundred fifty-six".