209244 has 48 divisors (see below), whose sum is σ = 580608. Its totient is φ = 57408.

The previous prime is 209233. The next prime is 209249. The reversal of 209244 is 442902.

209244 = T₂₄₁ + T₂₄₂ + ... + T₂₄₇.

209244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 209244.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3922 + ... + 3974.

It is an arithmetic number, because the mean of its divisors is an integer number (12096).

2²⁰⁹²⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290304).

209244 is an abundant number, since it is smaller than the sum of its proper divisors (371364).

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

209244 is a wasteful number, since it uses less digits than its factorization.

209244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 209244 is about 457.4319621539. The cubic root of 209244 is about 59.3678067001.

The spelling of 209244 in words is "two hundred nine thousand, two hundred forty-four".