851850 has 48 divisors (see below), whose sum is σ = 2351040. Its totient is φ = 226800.

The previous prime is 851843. The next prime is 851863. The reversal of 851850 is 58158.

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

It is an unprimeable number.

851850 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 23 ways as a sum of consecutive naturals, for example, 1035 + ... + 1665.

It is an arithmetic number, because the mean of its divisors is an integer number (48980).

2⁸⁵¹⁸⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175520).

851850 is an abundant number, since it is smaller than the sum of its proper divisors (1499190).

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

851850 is a wasteful number, since it uses less digits than its factorization.

851850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 851850 is about 922.9572037749. The cubic root of 851850 is about 94.7954973026.

The spelling of 851850 in words is "eight hundred fifty-one thousand, eight hundred fifty".