851784252 has 96 divisors (see below), whose sum is σ = 2357994240. Its totient is φ = 236344320.

The previous prime is 851784251. The next prime is 851784281. The reversal of 851784252 is 252487158.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851784251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77899 + ... + 88157.

It is an arithmetic number, because the mean of its divisors is an integer number (24562440).

Almost surely, 2^851784252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851784252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1178997120).

851784252 is an abundant number, since it is smaller than the sum of its proper divisors (1506209988).

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

851784252 is a wasteful number, since it uses less digits than its factorization.

851784252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10331 (or 10329 counting only the distinct ones).

The product of its digits is 179200, while the sum is 42.

The square root of 851784252 is about 29185.3431023176. The cubic root of 851784252 is about 947.9305838542.

The spelling of 851784252 in words is "eight hundred fifty-one million, seven hundred eighty-four thousand, two hundred fifty-two".