422016420 has 216 divisors, whose sum is σ = 1452717504. Its totient is φ = 91099008.

The previous prime is 422016383. The next prime is 422016421. The reversal of 422016420 is 24610224.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (422016421) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5341941 + ... + 5342019.

It is an arithmetic number, because the mean of its divisors is an integer number (6725544).

Almost surely, 2^422016420 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 422016420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (726358752).

422016420 is an abundant number, since it is smaller than the sum of its proper divisors (1030701084).

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

422016420 is a wasteful number, since it uses less digits than its factorization.

422016420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 422016420 is about 20543.0382368334. The cubic root of 422016420 is about 750.0837950819.

Adding to 422016420 its reverse (24610224), we get a palindrome (446626644).

The spelling of 422016420 in words is "four hundred twenty-two million, sixteen thousand, four hundred twenty".