856032128 has 64 divisors (see below), whose sum is σ = 1953871200. Its totient is φ = 365955072.

The previous prime is 856032077. The next prime is 856032139. The reversal of 856032128 is 821230658.

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

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455126 + ... + 457002.

Almost surely, 2^856032128 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 856032128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976935600).

856032128 is an abundant number, since it is smaller than the sum of its proper divisors (1097839072).

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

856032128 is a wasteful number, since it uses less digits than its factorization.

856032128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407 (or 2395 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 856032128 is about 29258.0267277204. The cubic root of 856032128 is about 949.5037585573.

The spelling of 856032128 in words is "eight hundred fifty-six million, thirty-two thousand, one hundred twenty-eight".