855424 has 32 divisors (see below), whose sum is σ = 1756440. Its totient is φ = 414720.

The previous prime is 855419. The next prime is 855427. The reversal of 855424 is 424558.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 855392 and 855401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855427) 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 in 3 ways as a sum of consecutive naturals, for example, 5167 + ... + 5329.

2⁸⁵⁵⁴²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878220).

855424 is an abundant number, since it is smaller than the sum of its proper divisors (901016).

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

855424 is a wasteful number, since it uses less digits than its factorization.

855424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 206 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 855424 is about 924.8913449698. The cubic root of 855424 is about 94.9278861777.

The spelling of 855424 in words is "eight hundred fifty-five thousand, four hundred twenty-four".