209308 has 24 divisors (see below), whose sum is σ = 411264. Its totient is φ = 92400.

The previous prime is 209299. The next prime is 209311. The reversal of 209308 is 803902.

209308 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 (22).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2913 + ... + 2983.

It is an arithmetic number, because the mean of its divisors is an integer number (17136).

2²⁰⁹³⁰⁸ is an apocalyptic number.

It is an amenable number.

209308 is a deficient number, since it is larger than the sum of its proper divisors (201956).

209308 is a wasteful number, since it uses less digits than its factorization.

209308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 209308 is about 457.5019125643. The cubic root of 209308 is about 59.3738588885.

The spelling of 209308 in words is "two hundred nine thousand, three hundred eight".