842638422 has 16 divisors (see below), whose sum is σ = 1784410992. Its totient is φ = 264357120.

The previous prime is 842638421. The next prime is 842638427. The reversal of 842638422 is 224836248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842638421) 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, 4130479 + ... + 4130682.

It is an arithmetic number, because the mean of its divisors is an integer number (111525687).

Almost surely, 2^842638422 is an apocalyptic number.

842638422 is an abundant number, since it is smaller than the sum of its proper divisors (941772570).

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

842638422 is a wasteful number, since it uses less digits than its factorization.

842638422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8261183.

The product of its digits is 147456, while the sum is 39.

The square root of 842638422 is about 29028.2349101698. The cubic root of 842638422 is about 944.5256419427.

The spelling of 842638422 in words is "eight hundred forty-two million, six hundred thirty-eight thousand, four hundred twenty-two".