399926 has 8 divisors (see below), whose sum is σ = 602640. Its totient is φ = 199048.

The previous prime is 399913. The next prime is 399937. The reversal of 399926 is 629993.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 399926.

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, 440 + ... + 996.

It is an arithmetic number, because the mean of its divisors is an integer number (75330).

2³⁹⁹⁹²⁶ is an apocalyptic number.

399926 is a deficient number, since it is larger than the sum of its proper divisors (202714).

399926 is a wasteful number, since it uses less digits than its factorization.

399926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918.

The product of its digits is 26244, while the sum is 38.

The square root of 399926 is about 632.3970271910. The cubic root of 399926 is about 73.6760860537.

The spelling of 399926 in words is "three hundred ninety-nine thousand, nine hundred twenty-six".