396839 has 4 divisors (see below), whose sum is σ = 406560. Its totient is φ = 387120.

The previous prime is 396833. The next prime is 396871. The reversal of 396839 is 938693.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396839 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396833) 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, 4799 + ... + 4880.

It is an arithmetic number, because the mean of its divisors is an integer number (101640).

2³⁹⁶⁸³⁹ is an apocalyptic number.

396839 is a deficient number, since it is larger than the sum of its proper divisors (9721).

396839 is an equidigital number, since it uses as much as digits as its factorization.

396839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720.

The product of its digits is 34992, while the sum is 38.

The square root of 396839 is about 629.9515854413. The cubic root of 396839 is about 73.4860293992.

The spelling of 396839 in words is "three hundred ninety-six thousand, eight hundred thirty-nine".