399500 has 48 divisors (see below), whose sum is σ = 943488. Its totient is φ = 147200.

The previous prime is 399499. The next prime is 399523. The reversal of 399500 is 5993.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 399500.

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 15 ways as a sum of consecutive naturals, for example, 8477 + ... + 8523.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2³⁹⁹⁵⁰⁰ 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 399500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471744).

399500 is an abundant number, since it is smaller than the sum of its proper divisors (543988).

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

399500 is a wasteful number, since it uses less digits than its factorization.

399500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 399500 is about 632.0601237224. The cubic root of 399500 is about 73.6499169097.

The spelling of 399500 in words is "three hundred ninety-nine thousand, five hundred".