855611344 has 120 divisors (see below), whose sum is σ = 2061028800. Its totient is φ = 342074880.

The previous prime is 855611261. The next prime is 855611353. The reversal of 855611344 is 443116558.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1057212 + ... + 1058020.

It is an arithmetic number, because the mean of its divisors is an integer number (17175240).

Almost surely, 2^855611344 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 855611344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1030514400).

855611344 is an abundant number, since it is smaller than the sum of its proper divisors (1205417456).

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

855611344 is a wasteful number, since it uses less digits than its factorization.

855611344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 908 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 855611344 is about 29250.8349282546. The cubic root of 855611344 is about 949.3481563478.

It can be divided in two parts, 8556 and 11344, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 855611344 in words is "eight hundred fifty-five million, six hundred eleven thousand, three hundred forty-four".