871228394455320 has 1024 divisors, whose sum is σ = 3261430361548800. Its totient is φ = 206812453478400.

The previous prime is 871228394455267. The next prime is 871228394455343. The reversal of 871228394455320 is 23554493822178.

871228394455320 is a `hidden beast` number, since 8 + 7 + 1 + 2 + 2 + 8 + 3 + 94 + 4 + 5 + 532 + 0 = 666.

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 255 ways as a sum of consecutive naturals, for example, 13482092610 + ... + 13482157230.

It is an arithmetic number, because the mean of its divisors is an integer number (3184990587450).

Almost surely, 2^{871228394455320} 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 871228394455320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1630715180774400).

871228394455320 is an abundant number, since it is smaller than the sum of its proper divisors (2390201967093480).

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

871228394455320 is a wasteful number, since it uses less digits than its factorization.

871228394455320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64870 (or 64838 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 63.

The spelling of 871228394455320 in words is "eight hundred seventy-one trillion, two hundred twenty-eight billion, three hundred ninety-four million, four hundred fifty-five thousand, three hundred twenty".