399830 has 8 divisors (see below), whose sum is σ = 719712. Its totient is φ = 159928.

The previous prime is 399793. The next prime is 399851. The reversal of 399830 is 38993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19982 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (89964).

2³⁹⁹⁸³⁰ is an apocalyptic number.

399830 is a deficient number, since it is larger than the sum of its proper divisors (319882).

399830 is a wasteful number, since it uses less digits than its factorization.

399830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39990.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 399830 is about 632.3211209504. The cubic root of 399830 is about 73.6701904045.

The spelling of 399830 in words is "three hundred ninety-nine thousand, eight hundred thirty".