210128850 has 96 divisors (see below), whose sum is σ = 597818880. Its totient is φ = 54216000.

The previous prime is 210128843. The next prime is 210128879. The reversal of 210128850 is 58821012.

210128850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39340 + ... + 44360.

It is an arithmetic number, because the mean of its divisors is an integer number (6227280).

Almost surely, 2^210128850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210128850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298909440).

210128850 is an abundant number, since it is smaller than the sum of its proper divisors (387690030).

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

210128850 is a wasteful number, since it uses less digits than its factorization.

210128850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073 (or 5062 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 210128850 is about 14495.8218118187. The cubic root of 210128850 is about 594.5137377775.

Adding to 210128850 its reverse (58821012), we get a palindrome (268949862).

The spelling of 210128850 in words is "two hundred ten million, one hundred twenty-eight thousand, eight hundred fifty".