850852640 has 144 divisors (see below), whose sum is σ = 2244231360. Its totient is φ = 304550400.

The previous prime is 850852637. The next prime is 850852643. The reversal of 850852640 is 46258058.

It is an interprime number because it is at equal distance from previous prime (850852637) and next prime (850852643).

It is a junction number, because it is equal to n+sod(n) for n = 850852594 and 850852603.

It is not an unprimeable number, because it can be changed into a prime (850852643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1374251 + ... + 1374869.

It is an arithmetic number, because the mean of its divisors is an integer number (15584940).

Almost surely, 2^850852640 is an apocalyptic number.

850852640 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 850852640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1122115680).

850852640 is an abundant number, since it is smaller than the sum of its proper divisors (1393378720).

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

850852640 is a wasteful number, since it uses less digits than its factorization.

850852640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 850852640 is about 29169.3784644102. The cubic root of 850852640 is about 947.5848681183.

The spelling of 850852640 in words is "eight hundred fifty million, eight hundred fifty-two thousand, six hundred forty".