209240 has 16 divisors (see below), whose sum is σ = 470880. Its totient is φ = 83680.

The previous prime is 209233. The next prime is 209249. The reversal of 209240 is 42902.

209240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 209240.

It is not an unprimeable number, because it can be changed into a prime (209249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576 + ... + 2655.

It is an arithmetic number, because the mean of its divisors is an integer number (29430).

2²⁰⁹²⁴⁰ is an apocalyptic number.

209240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209240 is an abundant number, since it is smaller than the sum of its proper divisors (261640).

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

209240 is a wasteful number, since it uses less digits than its factorization.

209240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242 (or 5238 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 209240 is about 457.4275898981. The cubic root of 209240 is about 59.3674283974.

The spelling of 209240 in words is "two hundred nine thousand, two hundred forty".