399304 has 32 divisors (see below), whose sum is σ = 820800. Its totient is φ = 181440.

The previous prime is 399283. The next prime is 399353. The reversal of 399304 is 403993.

It is an unprimeable number.

399304 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5589 + ... + 5659.

It is an arithmetic number, because the mean of its divisors is an integer number (25650).

2³⁹⁹³⁰⁴ is an apocalyptic number.

It is an amenable number.

399304 is an abundant number, since it is smaller than the sum of its proper divisors (421496).

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

399304 is a wasteful number, since it uses less digits than its factorization.

399304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 399304 is about 631.9050561595. The cubic root of 399304 is about 73.6378703973.

It can be divided in two parts, 399 and 304, that added together give a triangular number (703 = T₃₇).

The spelling of 399304 in words is "three hundred ninety-nine thousand, three hundred four".