422908128 has 120 divisors (see below), whose sum is σ = 1252489392. Its totient is φ = 139981824.

The previous prime is 422908117. The next prime is 422908141. The reversal of 422908128 is 821809224.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 422908092 and 422908101.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 432376 + ... + 433352.

Almost surely, 2^422908128 is an apocalyptic number.

422908128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422908128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626244696).

422908128 is an abundant number, since it is smaller than the sum of its proper divisors (829581264).

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

422908128 is a wasteful number, since it uses less digits than its factorization.

422908128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 422908128 is about 20564.7301951667. The cubic root of 422908128 is about 750.6117249212.

The spelling of 422908128 in words is "four hundred twenty-two million, nine hundred eight thousand, one hundred twenty-eight".