399315 has 16 divisors (see below), whose sum is σ = 730368. Its totient is φ = 182496.

The previous prime is 399283. The next prime is 399353. The reversal of 399315 is 513993.

It is not a de Polignac number, because 399315 - 2⁵ = 399283 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1797 + ... + 2006.

It is an arithmetic number, because the mean of its divisors is an integer number (45648).

2³⁹⁹³¹⁵ is an apocalyptic number.

399315 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

399315 is a deficient number, since it is larger than the sum of its proper divisors (331053).

399315 is a wasteful number, since it uses less digits than its factorization.

399315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818.

The product of its digits is 3645, while the sum is 30.

The square root of 399315 is about 631.9137599388. The cubic root of 399315 is about 73.6385465814.

It can be divided in two parts, 3993 and 15, that multiplied together give a palindrome (59895).

The spelling of 399315 in words is "three hundred ninety-nine thousand, three hundred fifteen".