378205 has 4 divisors (see below), whose sum is σ = 453852. Its totient is φ = 302560.

The previous prime is 378193. The next prime is 378223. The reversal of 378205 is 502873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 298116 + 80089 = 546^2 + 283^2 .

It is a de Polignac number, because none of the positive numbers 2^k-378205 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 378205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37816 + ... + 37825.

It is an arithmetic number, because the mean of its divisors is an integer number (113463).

2³⁷⁸²⁰⁵ is an apocalyptic number.

It is an amenable number.

378205 is a deficient number, since it is larger than the sum of its proper divisors (75647).

378205 is an equidigital number, since it uses as much as digits as its factorization.

378205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75646.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 378205 is about 614.9837396224. The cubic root of 378205 is about 72.3173364404.

The spelling of 378205 in words is "three hundred seventy-eight thousand, two hundred five".