206805712 has 20 divisors (see below), whose sum is σ = 413612416. Its totient is φ = 100067040.

The previous prime is 206805701. The next prime is 206805737. The reversal of 206805712 is 217508602.

206805712 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207978 + ... + 208969.

Almost surely, 2^206805712 is an apocalyptic number.

It is an amenable number.

206805712 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

206805712 is a wasteful number, since it uses less digits than its factorization.

206805712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416986 (or 416980 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 206805712 is about 14380.7410101149. The cubic root of 206805712 is about 591.3630384287.

The spelling of 206805712 in words is "two hundred six million, eight hundred five thousand, seven hundred twelve".