399838 has 8 divisors (see below), whose sum is σ = 619200. Its totient is φ = 193440.

The previous prime is 399793. The next prime is 399851. The reversal of 399838 is 838993.

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

It is a self number, because there is not a number n which added to its sum of digits gives 399838.

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, 3163 + ... + 3286.

It is an arithmetic number, because the mean of its divisors is an integer number (77400).

2³⁹⁹⁸³⁸ is an apocalyptic number.

399838 is a deficient number, since it is larger than the sum of its proper divisors (219362).

399838 is a wasteful number, since it uses less digits than its factorization.

399838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482.

The product of its digits is 46656, while the sum is 40.

The square root of 399838 is about 632.3274468185. The cubic root of 399838 is about 73.6706817446.

The spelling of 399838 in words is "three hundred ninety-nine thousand, eight hundred thirty-eight".