422138988 has 18 divisors (see below), whose sum is σ = 1067073644. Its totient is φ = 140712984.

The previous prime is 422138963. The next prime is 422138999. The reversal of 422138988 is 889831224.

422138988 is a `hidden beast` number, since 422 + 138 + 98 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5863006 + ... + 5863077.

Almost surely, 2^422138988 is an apocalyptic number.

It is an amenable number.

422138988 is an abundant number, since it is smaller than the sum of its proper divisors (644934656).

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

422138988 is a wasteful number, since it uses less digits than its factorization.

422138988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11726093 (or 11726088 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 422138988 is about 20546.0212206646. The cubic root of 422138988 is about 750.1564047145.

The spelling of 422138988 in words is "four hundred twenty-two million, one hundred thirty-eight thousand, nine hundred eighty-eight".