850000008 has 128 divisors (see below), whose sum is σ = 2544151680. Its totient is φ = 233226240.

The previous prime is 849999977. The next prime is 850000013. The reversal of 850000008 is 800000058.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179560 + ... + 184232.

It is an arithmetic number, because the mean of its divisors is an integer number (19876185).

Almost surely, 2^850000008 is an apocalyptic number.

850000008 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 850000008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1272075840).

850000008 is an abundant number, since it is smaller than the sum of its proper divisors (1694151672).

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

850000008 is a wasteful number, since it uses less digits than its factorization.

850000008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4759 (or 4755 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 850000008 is about 29154.7596114254. The cubic root of 850000008 is about 947.2682401577.

The spelling of 850000008 in words is "eight hundred fifty million, eight", and thus it is an aban number.