851774022 has 128 divisors (see below), whose sum is σ = 2155507200. Its totient is φ = 246960000.

The previous prime is 851774017. The next prime is 851774023. The reversal of 851774022 is 220477158.

851774022 is a `hidden beast` number, since 85 + 177 + 402 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851774023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3393397 + ... + 3393647.

It is an arithmetic number, because the mean of its divisors is an integer number (16839900).

Almost surely, 2^851774022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851774022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1077753600).

851774022 is an abundant number, since it is smaller than the sum of its proper divisors (1303733178).

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

851774022 is a wasteful number, since it uses less digits than its factorization.

851774022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 851774022 is about 29185.1678425874. The cubic root of 851774022 is about 947.9267889305.

The spelling of 851774022 in words is "eight hundred fifty-one million, seven hundred seventy-four thousand, twenty-two".