378839 has 4 divisors (see below), whose sum is σ = 385320. Its totient is φ = 372360.

The previous prime is 378823. The next prime is 378869. The reversal of 378839 is 938873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938873 = 13 ⋅72221.

It is a cyclic number.

It is not a de Polignac number, because 378839 - 2⁴ = 378823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3152 + ... + 3269.

It is an arithmetic number, because the mean of its divisors is an integer number (96330).

2³⁷⁸⁸³⁹ is an apocalyptic number.

378839 is a deficient number, since it is larger than the sum of its proper divisors (6481).

378839 is an equidigital number, since it uses as much as digits as its factorization.

378839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480.

The product of its digits is 36288, while the sum is 38.

The square root of 378839 is about 615.4989845646. The cubic root of 378839 is about 72.3577233519.

The spelling of 378839 in words is "three hundred seventy-eight thousand, eight hundred thirty-nine".