399814 has 8 divisors (see below), whose sum is σ = 613800. Its totient is φ = 195216.

The previous prime is 399793. The next prime is 399851. The reversal of 399814 is 418993.

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 399814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2239 + ... + 2410.

It is an arithmetic number, because the mean of its divisors is an integer number (76725).

2³⁹⁹⁸¹⁴ is an apocalyptic number.

399814 is a deficient number, since it is larger than the sum of its proper divisors (213986).

399814 is a wasteful number, since it uses less digits than its factorization.

399814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694.

The product of its digits is 7776, while the sum is 34.

The square root of 399814 is about 632.3084690244. The cubic root of 399814 is about 73.6692077045.

The spelling of 399814 in words is "three hundred ninety-nine thousand, eight hundred fourteen".