870912128 has 64 divisors (see below), whose sum is σ = 1789439040. Its totient is φ = 422016000.

The previous prime is 870912083. The next prime is 870912143. The reversal of 870912128 is 821219078.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 870912091 and 870912100.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 553583 + ... + 555153.

It is an arithmetic number, because the mean of its divisors is an integer number (27959985).

Almost surely, 2^870912128 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 870912128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894719520).

870912128 is an abundant number, since it is smaller than the sum of its proper divisors (918526912).

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

870912128 is a wasteful number, since it uses less digits than its factorization.

870912128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 870912128 is about 29511.2203746304. The cubic root of 870912128 is about 954.9737766800.

The spelling of 870912128 in words is "eight hundred seventy million, nine hundred twelve thousand, one hundred twenty-eight".