840678122 has 16 divisors (see below), whose sum is σ = 1292086752. Its totient is φ = 410009040.

The previous prime is 840678109. The next prime is 840678173. The reversal of 840678122 is 221876048.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61472 + ... + 73892.

It is an arithmetic number, because the mean of its divisors is an integer number (80755422).

Almost surely, 2^840678122 is an apocalyptic number.

840678122 is a deficient number, since it is larger than the sum of its proper divisors (451408630).

840678122 is a wasteful number, since it uses less digits than its factorization.

840678122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13253.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 840678122 is about 28994.4498482037. The cubic root of 840678122 is about 943.7926303156.

The spelling of 840678122 in words is "eight hundred forty million, six hundred seventy-eight thousand, one hundred twenty-two".