805998 has 8 divisors (see below), whose sum is σ = 1612008. Its totient is φ = 268664.

The previous prime is 805991. The next prime is 806009. The reversal of 805998 is 899508.

805998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

805998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805991) by changing a digit.

805998 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 3 ways as a sum of consecutive naturals, for example, 67161 + ... + 67172.

It is an arithmetic number, because the mean of its divisors is an integer number (201501).

2⁸⁰⁵⁹⁹⁸ is an apocalyptic number.

805998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

805998 is a wasteful number, since it uses less digits than its factorization.

805998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134338.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 805998 is about 897.7739136330. The cubic root of 805998 is about 93.0632013453.

The spelling of 805998 in words is "eight hundred five thousand, nine hundred ninety-eight".