399788 has 12 divisors (see below), whose sum is σ = 708120. Its totient is φ = 197472.

The previous prime is 399787. The next prime is 399793. The reversal of 399788 is 887993.

It is not an unprimeable number, because it can be changed into a prime (399781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206 + ... + 917.

It is an arithmetic number, because the mean of its divisors is an integer number (59010).

2³⁹⁹⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

399788 is a deficient number, since it is larger than the sum of its proper divisors (308332).

399788 is a wasteful number, since it uses less digits than its factorization.

399788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216 (or 1214 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 399788 is about 632.2879091047. The cubic root of 399788 is about 73.6676107612.

The spelling of 399788 in words is "three hundred ninety-nine thousand, seven hundred eighty-eight".