856798 has 16 divisors (see below), whose sum is σ = 1341360. Its totient is φ = 410176.

The previous prime is 856789. The next prime is 856799. The reversal of 856798 is 897658.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856799) by changing a digit.

856798 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 7 ways as a sum of consecutive naturals, for example, 6186 + ... + 6322.

It is an arithmetic number, because the mean of its divisors is an integer number (83835).

2⁸⁵⁶⁷⁹⁸ is an apocalyptic number.

856798 is a deficient number, since it is larger than the sum of its proper divisors (484562).

856798 is a wasteful number, since it uses less digits than its factorization.

856798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251.

The product of its digits is 120960, while the sum is 43.

The square root of 856798 is about 925.6338368923. The cubic root of 856798 is about 94.9786840448.

The spelling of 856798 in words is "eight hundred fifty-six thousand, seven hundred ninety-eight".