422189856 has 144 divisors (see below), whose sum is σ = 1328902848. Its totient is φ = 126067200.

The previous prime is 422189839. The next prime is 422189857. The reversal of 422189856 is 658981224.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (422189857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 223990 + ... + 225866.

It is an arithmetic number, because the mean of its divisors is an integer number (9228492).

Almost surely, 2^422189856 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 422189856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (664451424).

422189856 is an abundant number, since it is smaller than the sum of its proper divisors (906712992).

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

422189856 is a wasteful number, since it uses less digits than its factorization.

422189856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975 (or 1964 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 422189856 is about 20547.2590872846. The cubic root of 422189856 is about 750.1865349358.

The spelling of 422189856 in words is "four hundred twenty-two million, one hundred eighty-nine thousand, eight hundred fifty-six".