206730 has 24 divisors (see below), whose sum is σ = 537732. Its totient is φ = 55104.

The previous prime is 206699. The next prime is 206749. The reversal of 206730 is 37602.

206730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 205209 + 1521 = 453^2 + 39^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

206730 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1059 + ... + 1238.

2²⁰⁶⁷³⁰ is an apocalyptic number.

206730 is an abundant number, since it is smaller than the sum of its proper divisors (331002).

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

206730 is a wasteful number, since it uses less digits than its factorization.

206730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310 (or 2307 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 206730 is about 454.6757086100. The cubic root of 206730 is about 59.1290863209.

The spelling of 206730 in words is "two hundred six thousand, seven hundred thirty".