422013144 has 32 divisors (see below), whose sum is σ = 1205752320. Its totient is φ = 120575136.

The previous prime is 422013143. The next prime is 422013167. The reversal of 422013144 is 441310224.

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

It is a self number, because there is not a number n which added to its sum of digits gives 422013144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422013143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255824 + ... + 1256159.

It is an arithmetic number, because the mean of its divisors is an integer number (37679760).

Almost surely, 2^422013144 is an apocalyptic number.

It is an amenable number.

422013144 is an abundant number, since it is smaller than the sum of its proper divisors (783739176).

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

422013144 is a wasteful number, since it uses less digits than its factorization.

422013144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511999 (or 2511995 counting only the distinct ones).

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

The square root of 422013144 is about 20542.9585016375. The cubic root of 422013144 is about 750.0818541773.

Adding to 422013144 its reverse (441310224), we get a palindrome (863323368).

The spelling of 422013144 in words is "four hundred twenty-two million, thirteen thousand, one hundred forty-four".