It is an unprimeable number.
Almost surely, 2856984128 is an apocalyptic number.
856984128 is a gapful number since it is divisible by the number (88) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 856984128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562352984).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
856984128 is a wasteful number, since it uses less digits than its factorization.
856984128 is an evil number, because the sum of its binary digits is even.
The square root of 856984128 is about 29274.2912467578. The cubic root of 856984128 is about 949.8556116662.
The spelling of 856984128 in words is "eight hundred fifty-six million, nine hundred eighty-four thousand, one hundred twenty-eight".