42228688 has 20 divisors (see below), whose sum is σ = 83814948. Its totient is φ = 20599040.

The previous prime is 42228679. The next prime is 42228689. The reversal of 42228688 is 88682224.

It can be written as a sum of positive squares in 2 ways, for example, as 16096144 + 26132544 = 4012^2 + 5112^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42228688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42228689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31531 + ... + 32842.

Almost surely, 2^42228688 is an apocalyptic number.

It is an amenable number.

42228688 is a deficient number, since it is larger than the sum of its proper divisors (41586260).

42228688 is a wasteful number, since it uses less digits than its factorization.

42228688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64422 (or 64416 counting only the distinct ones).

The product of its digits is 98304, while the sum is 40.

The square root of 42228688 is about 6498.3604085954. The cubic root of 42228688 is about 348.2324161971.

The spelling of 42228688 in words is "forty-two million, two hundred twenty-eight thousand, six hundred eighty-eight".