398209 has 8 divisors (see below), whose sum is σ = 459200. Its totient is φ = 338256.

The previous prime is 398207. The next prime is 398213. The reversal of 398209 is 902893.

It is a happy number.

398209 is nontrivially palindromic in base 6.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398209 - 2¹ = 398207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398207) 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 7 ways as a sum of consecutive naturals, for example, 967 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (57400).

2³⁹⁸²⁰⁹ is an apocalyptic number.

It is an amenable number.

398209 is a deficient number, since it is larger than the sum of its proper divisors (60991).

398209 is a wasteful number, since it uses less digits than its factorization.

398209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 398209 is about 631.0380337190. The cubic root of 398209 is about 73.5704970953.

The spelling of 398209 in words is "three hundred ninety-eight thousand, two hundred nine".