856078 has 4 divisors (see below), whose sum is σ = 1284120. Its totient is φ = 428038.

The previous prime is 856073. The next prime is 856081. The reversal of 856078 is 870658.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214018 + ... + 214021.

It is an arithmetic number, because the mean of its divisors is an integer number (321030).

2⁸⁵⁶⁰⁷⁸ is an apocalyptic number.

856078 is a deficient number, since it is larger than the sum of its proper divisors (428042).

856078 is a wasteful number, since it uses less digits than its factorization.

856078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428041.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 856078 is about 925.2448324633. The cubic root of 856078 is about 94.9520718535.

The spelling of 856078 in words is "eight hundred fifty-six thousand, seventy-eight".