850828821 has 16 divisors (see below), whose sum is σ = 1181790720. Its totient is φ = 543879360.

The previous prime is 850828813. The next prime is 850828829. The reversal of 850828821 is 128828058.

It is an interprime number because it is at equal distance from previous prime (850828813) and next prime (850828829).

It is not a de Polignac number, because 850828821 - 2³ = 850828813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850828829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31830 + ... + 52103.

It is an arithmetic number, because the mean of its divisors is an integer number (73861920).

Almost surely, 2^850828821 is an apocalyptic number.

It is an amenable number.

850828821 is a deficient number, since it is larger than the sum of its proper divisors (330961899).

850828821 is a wasteful number, since it uses less digits than its factorization.

850828821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84076.

The product of its (nonzero) digits is 81920, while the sum is 42.

The square root of 850828821 is about 29168.9701737994. The cubic root of 850828821 is about 947.5760257197.

The spelling of 850828821 in words is "eight hundred fifty million, eight hundred twenty-eight thousand, eight hundred twenty-one".