399604 has 6 divisors (see below), whose sum is σ = 699314. Its totient is φ = 199800.

The previous prime is 399601. The next prime is 399613. The reversal of 399604 is 406993.

399604 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 2704 = 630^2 + 52^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49947 + ... + 49954.

2³⁹⁹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

399604 is a deficient number, since it is larger than the sum of its proper divisors (299710).

399604 is a wasteful number, since it uses less digits than its factorization.

399604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99905 (or 99903 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 399604 is about 632.1423890232. The cubic root of 399604 is about 73.6563073367.

The spelling of 399604 in words is "three hundred ninety-nine thousand, six hundred four".