850851840 has 96 divisors (see below), whose sum is σ = 2722159440. Its totient is φ = 226885632.

The previous prime is 850851829. The next prime is 850851847. The reversal of 850851840 is 48158058.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850851847) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16872 + ... + 44568.

Almost surely, 2^850851840 is an apocalyptic number.

850851840 is a gapful number since it is divisible by the number (80) 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 850851840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1361079720).

850851840 is an abundant number, since it is smaller than the sum of its proper divisors (1871307600).

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

850851840 is a wasteful number, since it uses less digits than its factorization.

850851840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27727 (or 27707 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 39.

The square root of 850851840 is about 29169.3647513963. The cubic root of 850851840 is about 947.5845711346.

The spelling of 850851840 in words is "eight hundred fifty million, eight hundred fifty-one thousand, eight hundred forty".