380209 has 4 divisors (see below), whose sum is σ = 400240. Its totient is φ = 360180.

The previous prime is 380207. The next prime is 380231. The reversal of 380209 is 902083.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 380209 - 2¹ = 380207 is a prime.

It is a Duffinian number.

380209 is a modest number, since divided by 209 gives 38 as remainder.

380209 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 380209.

It is not an unprimeable number, because it can be changed into a prime (380201) 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, 9987 + ... + 10024.

It is an arithmetic number, because the mean of its divisors is an integer number (100060).

2³⁸⁰²⁰⁹ is an apocalyptic number.

It is an amenable number.

380209 is a deficient number, since it is larger than the sum of its proper divisors (20031).

380209 is a wasteful number, since it uses less digits than its factorization.

380209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20030.

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

The square root of 380209 is about 616.6108983792. The cubic root of 380209 is about 72.4448411208. Note that the first 3 decimals are identical.

The spelling of 380209 in words is "three hundred eighty thousand, two hundred nine".