378217 has 8 divisors (see below), whose sum is σ = 438912. Its totient is φ = 319200.

The previous prime is 378193. The next prime is 378223. The reversal of 378217 is 712873.

It is a happy number.

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

It is not a de Polignac number, because 378217 - 2⁷ = 378089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378277) 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, 117 + ... + 877.

It is an arithmetic number, because the mean of its divisors is an integer number (54864).

2³⁷⁸²¹⁷ is an apocalyptic number.

It is an amenable number.

378217 is a deficient number, since it is larger than the sum of its proper divisors (60695).

378217 is an equidigital number, since it uses as much as digits as its factorization.

378217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839.

The product of its digits is 2352, while the sum is 28.

The square root of 378217 is about 614.9934959006. The cubic root of 378217 is about 72.3181012804.

It can be divided in two parts, 378 and 217, that added together give a palindrome (595).

The spelling of 378217 in words is "three hundred seventy-eight thousand, two hundred seventeen".