It is a tau number, because it is divible by the number of its divisors (64).
It is a congruent number.
It is an unprimeable number.
206720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2206720 is an apocalyptic number.
206720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 206720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275400).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
206720 is a wasteful number, since it uses less digits than its factorization.
206720 is an odious number, because the sum of its binary digits is odd.
The square root of 206720 is about 454.6647116283. The cubic root of 206720 is about 59.1281329027.
The spelling of 206720 in words is "two hundred six thousand, seven hundred twenty".