858798 has 12 divisors (see below), whose sum is σ = 1860768. Its totient is φ = 286260.

The previous prime is 858787. The next prime is 858817. The reversal of 858798 is 897858.

It is a congruent number.

It is an unprimeable number.

858798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23838 + ... + 23873.

It is an arithmetic number, because the mean of its divisors is an integer number (155064).

2⁸⁵⁸⁷⁹⁸ is an apocalyptic number.

858798 is an abundant number, since it is smaller than the sum of its proper divisors (1001970).

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

858798 is a wasteful number, since it uses less digits than its factorization.

858798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47719 (or 47716 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 858798 is about 926.7135479748. The cubic root of 858798 is about 95.0525286599.

Subtracting 858798 from its reverse (897858), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 858798 in words is "eight hundred fifty-eight thousand, seven hundred ninety-eight".