399834 has 24 divisors (see below), whose sum is σ = 879060. Its totient is φ = 131328.

The previous prime is 399793. The next prime is 399851. The reversal of 399834 is 438993.

It can be written as a sum of positive squares in 2 ways, for example, as 378225 + 21609 = 615^2 + 147^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399834.

It is an unprimeable number.

399834 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1632 + ... + 1860.

2³⁹⁹⁸³⁴ is an apocalyptic number.

399834 is an abundant number, since it is smaller than the sum of its proper divisors (479226).

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

399834 is a wasteful number, since it uses less digits than its factorization.

399834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 331 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 399834 is about 632.3242838924. The cubic root of 399834 is about 73.6704360754.

The spelling of 399834 in words is "three hundred ninety-nine thousand, eight hundred thirty-four".