399908 has 12 divisors (see below), whose sum is σ = 741132. Its totient is φ = 188160.

The previous prime is 399899. The next prime is 399911. The reversal of 399908 is 809993.

399908 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 322624 + 77284 = 568^2 + 278^2 .

It is a congruent number.

It is an unprimeable number.

399908 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 2873 + ... + 3008.

It is an arithmetic number, because the mean of its divisors is an integer number (61761).

2³⁹⁹⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

399908 is a deficient number, since it is larger than the sum of its proper divisors (341224).

399908 is a wasteful number, since it uses less digits than its factorization.

399908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902 (or 5900 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 399908 is about 632.3827954649. The cubic root of 399908 is about 73.6749806914.

The spelling of 399908 in words is "three hundred ninety-nine thousand, nine hundred eight".