855778 has 16 divisors (see below), whose sum is σ = 1600704. Its totient is φ = 333360.

The previous prime is 855739. The next prime is 855781. The reversal of 855778 is 877558.

855778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 855778.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2625 + ... + 2932.

It is an arithmetic number, because the mean of its divisors is an integer number (100044).

2⁸⁵⁵⁷⁷⁸ is an apocalyptic number.

855778 is a deficient number, since it is larger than the sum of its proper divisors (744926).

855778 is a wasteful number, since it uses less digits than its factorization.

855778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577.

The product of its digits is 78400, while the sum is 40.

The square root of 855778 is about 925.0826990059. The cubic root of 855778 is about 94.9409790366.

It can be divided in two parts, 8 and 55778, that multiplied together give a square (446224 = 668²).

The spelling of 855778 in words is "eight hundred fifty-five thousand, seven hundred seventy-eight".