399800 has 24 divisors (see below), whose sum is σ = 930000. Its totient is φ = 159840.

The previous prime is 399793. The next prime is 399851. The reversal of 399800 is 8993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 800 + ... + 1199.

It is an arithmetic number, because the mean of its divisors is an integer number (38750).

2³⁹⁹⁸⁰⁰ is an apocalyptic number.

It is an amenable number.

399800 is an abundant number, since it is smaller than the sum of its proper divisors (530200).

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

399800 is a wasteful number, since it uses less digits than its factorization.

399800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015 (or 2006 counting only the distinct ones).

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

The square root of 399800 is about 632.2973983815. The cubic root of 399800 is about 73.6683478206.

The spelling of 399800 in words is "three hundred ninety-nine thousand, eight hundred".