422257986 has 48 divisors (see below), whose sum is σ = 953744064. Its totient is φ = 134890272.

The previous prime is 422257963. The next prime is 422257991. The reversal of 422257986 is 689752224.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39891 + ... + 49353.

It is an arithmetic number, because the mean of its divisors is an integer number (19869668).

Almost surely, 2^422257986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422257986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (476872032).

422257986 is an abundant number, since it is smaller than the sum of its proper divisors (531486078).

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

422257986 is a wasteful number, since it uses less digits than its factorization.

422257986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9575 (or 9572 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 422257986 is about 20548.9169057642. The cubic root of 422257986 is about 750.2268860234.

The spelling of 422257986 in words is "four hundred twenty-two million, two hundred fifty-seven thousand, nine hundred eighty-six".