856926 has 32 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 244728.

The previous prime is 856909. The next prime is 856927. The reversal of 856926 is 629658.

It is a d-powerful number, because it can be written as 8⁶ + 5⁶ + 9⁶ + 6² + 2¹⁰ + 6⁶ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856927) by changing a digit.

856926 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 15 ways as a sum of consecutive naturals, for example, 756 + ... + 1511.

It is an arithmetic number, because the mean of its divisors is an integer number (68040).

2⁸⁵⁶⁹²⁶ is an apocalyptic number.

856926 is the 756-th pentagonal number.

856926 is an abundant number, since it is smaller than the sum of its proper divisors (1320354).

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

856926 is a wasteful number, since it uses less digits than its factorization.

856926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285 (or 2279 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 856926 is about 925.7029761214. The cubic root of 856926 is about 94.9834135401.

The spelling of 856926 in words is "eight hundred fifty-six thousand, nine hundred twenty-six".