42228828 has 36 divisors (see below), whose sum is σ = 111388368. Its totient is φ = 13464000.

The previous prime is 42228793. The next prime is 42228829. The reversal of 42228828 is 82882224.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 42228792 and 42228801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42228829) 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 11 ways as a sum of consecutive naturals, for example, 24673 + ... + 26328.

Almost surely, 2^42228828 is an apocalyptic number.

It is an amenable number.

42228828 is an abundant number, since it is smaller than the sum of its proper divisors (69159540).

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

42228828 is a wasteful number, since it uses less digits than its factorization.

42228828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51034 (or 51029 counting only the distinct ones).

The product of its digits is 32768, while the sum is 36.

The square root of 42228828 is about 6498.3711805344. The cubic root of 42228828 is about 348.2328010262.

The spelling of 42228828 in words is "forty-two million, two hundred twenty-eight thousand, eight hundred twenty-eight".