206240 has 24 divisors (see below), whose sum is σ = 487620. Its totient is φ = 82432.

The previous prime is 206237. The next prime is 206249. The reversal of 206240 is 42602.

It can be written as a sum of positive squares in 2 ways, for example, as 204304 + 1936 = 452^2 + 44^2 .

It is not an unprimeable number, because it can be changed into a prime (206249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485 + ... + 804.

2²⁰⁶²⁴⁰ is an apocalyptic number.

206240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206240 is an abundant number, since it is smaller than the sum of its proper divisors (281380).

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

206240 is a wasteful number, since it uses less digits than its factorization.

206240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 206240 is about 454.1365433435. The cubic root of 206240 is about 59.0823326265.

Adding to 206240 its reverse (42602), we get a palindrome (248842).

The spelling of 206240 in words is "two hundred six thousand, two hundred forty".