399884 has 6 divisors (see below), whose sum is σ = 699804. Its totient is φ = 199940.

The previous prime is 399871. The next prime is 399887. The reversal of 399884 is 488993.

It is not an unprimeable number, because it can be changed into a prime (399887) 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, 49982 + ... + 49989.

It is an arithmetic number, because the mean of its divisors is an integer number (116634).

2³⁹⁹⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

399884 is a deficient number, since it is larger than the sum of its proper divisors (299920).

399884 is a wasteful number, since it uses less digits than its factorization.

399884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99975 (or 99973 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 399884 is about 632.3638193319. The cubic root of 399884 is about 73.6735068233.

The spelling of 399884 in words is "three hundred ninety-nine thousand, eight hundred eighty-four".