422042420 has 48 divisors (see below), whose sum is σ = 911285760. Its totient is φ = 164094336.

The previous prime is 422042407. The next prime is 422042429. The reversal of 422042420 is 24240224.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 422042392 and 422042401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422042429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195869 + ... + 198011.

It is an arithmetic number, because the mean of its divisors is an integer number (18985120).

Almost surely, 2^422042420 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 422042420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455642880).

422042420 is an abundant number, since it is smaller than the sum of its proper divisors (489243340).

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

422042420 is a wasteful number, since it uses less digits than its factorization.

422042420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424 (or 2422 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 422042420 is about 20543.6710448741. The cubic root of 422042420 is about 750.0991987308.

Adding to 422042420 its reverse (24240224), we get a palindrome (446282644).

The spelling of 422042420 in words is "four hundred twenty-two million, forty-two thousand, four hundred twenty".