42228628 has 24 divisors (see below), whose sum is σ = 79803752. Its totient is φ = 19436544.

The previous prime is 42228587. The next prime is 42228679. The reversal of 42228628 is 82682224.

It can be written as a sum of positive squares in 4 ways, for example, as 6563844 + 35664784 = 2562^2 + 5972^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42228593 and 42228602.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22876 + ... + 24652.

Almost surely, 2^42228628 is an apocalyptic number.

It is an amenable number.

42228628 is a deficient number, since it is larger than the sum of its proper divisors (37575124).

42228628 is a wasteful number, since it uses less digits than its factorization.

42228628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251 (or 2249 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 42228628 is about 6498.3557920446. The cubic root of 42228628 is about 348.2322512701.

The spelling of 42228628 in words is "forty-two million, two hundred twenty-eight thousand, six hundred twenty-eight".