855824 has 20 divisors (see below), whose sum is σ = 1679580. Its totient is φ = 422400.

The previous prime is 855821. The next prime is 855851. The reversal of 855824 is 428558.

It can be written as a sum of positive squares in 2 ways, for example, as 446224 + 409600 = 668^2 + 640^2 .

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (855821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124 + ... + 1724.

It is an arithmetic number, because the mean of its divisors is an integer number (83979).

2⁸⁵⁵⁸²⁴ is an apocalyptic number.

It is an amenable number.

855824 is a deficient number, since it is larger than the sum of its proper divisors (823756).

855824 is a wasteful number, since it uses less digits than its factorization.

855824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 692 counting only the distinct ones).

The product of its digits is 12800, while the sum is 32.

The square root of 855824 is about 925.1075613138. The cubic root of 855824 is about 94.9426801034.

Adding to 855824 its product of digits (12800), we get a square (868624 = 932²).

The spelling of 855824 in words is "eight hundred fifty-five thousand, eight hundred twenty-four".