422992128 has 108 divisors (see below), whose sum is σ = 1219409520. Its totient is φ = 130111488.

The previous prime is 422992123. The next prime is 422992139. The reversal of 422992128 is 821299224.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (422992123) 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 11 ways as a sum of consecutive naturals, for example, 128163 + ... + 131421.

Almost surely, 2^422992128 is an apocalyptic number.

422992128 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 422992128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (609704760).

422992128 is an abundant number, since it is smaller than the sum of its proper divisors (796417392).

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

422992128 is a wasteful number, since it uses less digits than its factorization.

422992128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304 (or 3277 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 422992128 is about 20566.7724254439. The cubic root of 422992128 is about 750.6614183074.

The spelling of 422992128 in words is "four hundred twenty-two million, nine hundred ninety-two thousand, one hundred twenty-eight".