850531128 has 48 divisors (see below), whose sum is σ = 2197191240. Its totient is φ = 274357440.

The previous prime is 850531117. The next prime is 850531133. The reversal of 850531128 is 821135058.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4626 + ... + 41502.

Almost surely, 2^850531128 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 850531128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098595620).

850531128 is an abundant number, since it is smaller than the sum of its proper divisors (1346660112).

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

850531128 is a wasteful number, since it uses less digits than its factorization.

850531128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36948 (or 36913 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 850531128 is about 29163.8668218054. The cubic root of 850531128 is about 947.4654983341.

The spelling of 850531128 in words is "eight hundred fifty million, five hundred thirty-one thousand, one hundred twenty-eight".