378209 has 8 divisors (see below), whose sum is σ = 416640. Its totient is φ = 341136.

The previous prime is 378193. The next prime is 378223. The reversal of 378209 is 902873.

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 378209 - 2⁴ = 378193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 378209.

It is not an unprimeable number, because it can be changed into a prime (378229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (52080).

2³⁷⁸²⁰⁹ is an apocalyptic number.

It is an amenable number.

378209 is a deficient number, since it is larger than the sum of its proper divisors (38431).

378209 is a wasteful number, since it uses less digits than its factorization.

378209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 378209 is about 614.9869917323. The cubic root of 378209 is about 72.3175913889.

The spelling of 378209 in words is "three hundred seventy-eight thousand, two hundred nine".