873421056 has 180 divisors, whose sum is σ = 2644635532. Its totient is φ = 286654464.

The previous prime is 873421049. The next prime is 873421057. The reversal of 873421056 is 650124378.

It can be written as a sum of positive squares in 2 ways, for example, as 740710656 + 132710400 = 27216^2 + 11520^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 873421056.

It is not an unprimeable number, because it can be changed into a prime (873421057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1513440 + ... + 1514016.

Almost surely, 2^873421056 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 873421056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322317766).

873421056 is an abundant number, since it is smaller than the sum of its proper divisors (1771214476).

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

873421056 is an equidigital number, since it uses as much as digits as its factorization.

873421056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 873421056 is about 29553.6978396951. The cubic root of 873421056 is about 955.8899285630.

The spelling of 873421056 in words is "eight hundred seventy-three million, four hundred twenty-one thousand, fifty-six".