838839 has 4 divisors (see below), whose sum is σ = 1118456. Its totient is φ = 559224.

The previous prime is 838837. The next prime is 838853. The reversal of 838839 is 938838.

It is a happy number.

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

It is not a de Polignac number, because 838839 - 2¹ = 838837 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 838797 and 838806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838837) 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, 139804 + ... + 139809.

It is an arithmetic number, because the mean of its divisors is an integer number (279614).

2⁸³⁸⁸³⁹ is an apocalyptic number.

838839 is a deficient number, since it is larger than the sum of its proper divisors (279617).

838839 is a wasteful number, since it uses less digits than its factorization.

838839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279616.

The product of its digits is 41472, while the sum is 39.

The square root of 838839 is about 915.8815425589. The cubic root of 838839 is about 94.3103893834.

Subtracting 838839 from its reverse (938838), we obtain a palindrome (99999).

The spelling of 838839 in words is "eight hundred thirty-eight thousand, eight hundred thirty-nine".