399930 has 16 divisors (see below), whose sum is σ = 959904. Its totient is φ = 106640.

The previous prime is 399913. The next prime is 399937. The reversal of 399930 is 39993.

It is a junction number, because it is equal to n+sod(n) for n = 399891 and 399900.

It is not an unprimeable number, because it can be changed into a prime (399937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6636 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (59994).

2³⁹⁹⁹³⁰ is an apocalyptic number.

399930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399930 is an abundant number, since it is smaller than the sum of its proper divisors (559974).

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

399930 is a wasteful number, since it uses less digits than its factorization.

399930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13341.

The product of its (nonzero) digits is 6561, while the sum is 33.

The square root of 399930 is about 632.4001897533. The cubic root of 399930 is about 73.6763316853.

The spelling of 399930 in words is "three hundred ninety-nine thousand, nine hundred thirty".