850489728 has 256 divisors, whose sum is σ = 2617401600. Its totient is φ = 242278400.

The previous prime is 850489721. The next prime is 850489729. The reversal of 850489728 is 827984058.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850489721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6492223 + ... + 6492353.

It is an arithmetic number, because the mean of its divisors is an integer number (10224225).

Almost surely, 2^850489728 is an apocalyptic number.

850489728 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 850489728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308700800).

850489728 is an abundant number, since it is smaller than the sum of its proper divisors (1766911872).

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

850489728 is a wasteful number, since it uses less digits than its factorization.

850489728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The square root of 850489728 is about 29163.1570307469. The cubic root of 850489728 is about 947.4501253094.

The spelling of 850489728 in words is "eight hundred fifty million, four hundred eighty-nine thousand, seven hundred twenty-eight".