42228928 has 28 divisors (see below), whose sum is σ = 95770192. Its totient is φ = 18097920.

The previous prime is 42228911. The next prime is 42228937. The reversal of 42228928 is 82982224.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46683 + ... + 47578.

It is an arithmetic number, because the mean of its divisors is an integer number (3420364).

Almost surely, 2^42228928 is an apocalyptic number.

It is an amenable number.

42228928 is an abundant number, since it is smaller than the sum of its proper divisors (53541264).

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

42228928 is an equidigital number, since it uses as much as digits as its factorization.

42228928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94280 (or 94270 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 42228928 is about 6498.3788747656. The cubic root of 42228928 is about 348.2330759036.

The spelling of 42228928 in words is "forty-two million, two hundred twenty-eight thousand, nine hundred twenty-eight".