399938 has 32 divisors (see below), whose sum is σ = 777600. Its totient is φ = 152880.

The previous prime is 399937. The next prime is 399941. The reversal of 399938 is 839993.

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 399895 and 399904.

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 399938.

It is not an unprimeable number, because it can be changed into a prime (399937) 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 in 15 ways as a sum of consecutive naturals, for example, 7520 + ... + 7572.

It is an arithmetic number, because the mean of its divisors is an integer number (24300).

2³⁹⁹⁹³⁸ is an apocalyptic number.

399938 is a deficient number, since it is larger than the sum of its proper divisors (377662).

399938 is a wasteful number, since it uses less digits than its factorization.

399938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 73 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 399938 is about 632.4065148305. The cubic root of 399938 is about 73.6768229436.

The spelling of 399938 in words is "three hundred ninety-nine thousand, nine hundred thirty-eight".