422143140 has 144 divisors (see below), whose sum is σ = 1298606400. Its totient is φ = 102057984.

The previous prime is 422143091. The next prime is 422143153. The reversal of 422143140 is 41341224.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3735724 + ... + 3735836.

It is an arithmetic number, because the mean of its divisors is an integer number (9018100).

Almost surely, 2^422143140 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 422143140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649303200).

422143140 is an abundant number, since it is smaller than the sum of its proper divisors (876463260).

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

422143140 is a wasteful number, since it uses less digits than its factorization.

422143140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 171 counting only the distinct ones).

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

The square root of 422143140 is about 20546.1222618771. The cubic root of 422143140 is about 750.1588641250.

Adding to 422143140 its reverse (41341224), we get a palindrome (463484364).

It can be divided in two parts, 42214 and 3140, that added together give a palindrome (45354).

The spelling of 422143140 in words is "four hundred twenty-two million, one hundred forty-three thousand, one hundred forty".