399318 has 8 divisors (see below), whose sum is σ = 798648. Its totient is φ = 133104.

The previous prime is 399283. The next prime is 399353. The reversal of 399318 is 813993.

It is an interprime number because it is at equal distance from previous prime (399283) and next prime (399353).

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

399318 is an admirable number.

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, 33271 + ... + 33282.

It is an arithmetic number, because the mean of its divisors is an integer number (99831).

2³⁹⁹³¹⁸ is an apocalyptic number.

399318 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399318 is a wasteful number, since it uses less digits than its factorization.

399318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66558.

The product of its digits is 5832, while the sum is 33.

The square root of 399318 is about 631.9161336760. The cubic root of 399318 is about 73.6387309932.

It can be divided in two parts, 399 and 318, that added together give a palindrome (717).

The spelling of 399318 in words is "three hundred ninety-nine thousand, three hundred eighteen".