399008 has 24 divisors (see below), whose sum is σ = 809172. Its totient is φ = 193536.

The previous prime is 398989. The next prime is 399023. The reversal of 399008 is 800993.

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 4624 = 628^2 + 68^2 .

It is an unprimeable 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, 1016 + ... + 1352.

2³⁹⁹⁰⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404586).

399008 is an abundant number, since it is smaller than the sum of its proper divisors (410164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399008 is a wasteful number, since it uses less digits than its factorization.

399008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 399008 is about 631.6708003383. The cubic root of 399008 is about 73.6196702308.

The spelling of 399008 in words is "three hundred ninety-nine thousand, eight".