840856122 has 24 divisors (see below), whose sum is σ = 1822553460. Its totient is φ = 280177920.

The previous prime is 840856111. The next prime is 840856157. The reversal of 840856122 is 221658048.

840856122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 655923321 + 184932801 = 25611^2 + 13599^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49672 + ... + 64412.

Almost surely, 2^840856122 is an apocalyptic number.

840856122 is an abundant number, since it is smaller than the sum of its proper divisors (981697338).

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

840856122 is a wasteful number, since it uses less digits than its factorization.

840856122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17918 (or 17915 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 840856122 is about 28997.5192387211. The cubic root of 840856122 is about 943.8592365582.

The spelling of 840856122 in words is "eight hundred forty million, eight hundred fifty-six thousand, one hundred twenty-two".