840042222 has 16 divisors (see below), whose sum is σ = 1680397392. Its totient is φ = 279961920.

The previous prime is 840042197. The next prime is 840042223. The reversal of 840042222 is 222240048.

It is a junction number, because it is equal to n+sod(n) for n = 840042192 and 840042201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840042223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36108 + ... + 54624.

It is an arithmetic number, because the mean of its divisors is an integer number (105024837).

Almost surely, 2^840042222 is an apocalyptic number.

840042222 is an abundant number, since it is smaller than the sum of its proper divisors (840355170).

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

840042222 is a wasteful number, since it uses less digits than its factorization.

840042222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26083.

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 840042222 is about 28983.4818819272. The cubic root of 840042222 is about 943.5546045663.

The spelling of 840042222 in words is "eight hundred forty million, forty-two thousand, two hundred twenty-two".