805858 has 8 divisors (see below), whose sum is σ = 1216080. Its totient is φ = 400500.

The previous prime is 805853. The next prime is 805859. The reversal of 805858 is 858508.

805858 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.

It is not an unprimeable number, because it can be changed into a prime (805853) by changing a digit.

805858 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, 768 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (152010).

2⁸⁰⁵⁸⁵⁸ is an apocalyptic number.

805858 is a deficient number, since it is larger than the sum of its proper divisors (410222).

805858 is a wasteful number, since it uses less digits than its factorization.

805858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 805858 is about 897.6959396143. The cubic root of 805858 is about 93.0578127453.

Subtracting 805858 from its reverse (858508), we obtain a triangular number (52650 = T₃₂₄).

It can be divided in two parts, 80585 and 8, that multiplied together give a triangular number (644680 = T₁₁₃₅).

The spelling of 805858 in words is "eight hundred five thousand, eight hundred fifty-eight".