399584 has 12 divisors (see below), whose sum is σ = 786744. Its totient is φ = 199776.

The previous prime is 399583. The next prime is 399587. The reversal of 399584 is 485993.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399584.

It is not an unprimeable number, because it can be changed into a prime (399583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6212 + ... + 6275.

It is an arithmetic number, because the mean of its divisors is an integer number (65562).

2³⁹⁹⁵⁸⁴ is an apocalyptic number.

It is an amenable number.

399584 is a deficient number, since it is larger than the sum of its proper divisors (387160).

399584 is a wasteful number, since it uses less digits than its factorization.

399584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12497 (or 12489 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 399584 is about 632.1265696045. The cubic root of 399584 is about 73.6550784945.

The spelling of 399584 in words is "three hundred ninety-nine thousand, five hundred eighty-four".