42306228 has 18 divisors (see below), whose sum is σ = 106940834. Its totient is φ = 14102064.

The previous prime is 42306221. The next prime is 42306233. The reversal of 42306228 is 82260324.

42306228 is a `hidden beast` number, since 4 + 2 + 30 + 622 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30935844 + 11370384 = 5562^2 + 3372^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42306221) 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 5 ways as a sum of consecutive naturals, for example, 587551 + ... + 587622.

Almost surely, 2^42306228 is an apocalyptic number.

It is an amenable number.

42306228 is an abundant number, since it is smaller than the sum of its proper divisors (64634606).

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

42306228 is a wasteful number, since it uses less digits than its factorization.

42306228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175183 (or 1175178 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 42306228 is about 6504.3237926782. The cubic root of 42306228 is about 348.4454264574.

Subtracting from 42306228 its sum of digits (27), we obtain a triangular number (42306201 = T₉₁₉₈).

The spelling of 42306228 in words is "forty-two million, three hundred six thousand, two hundred twenty-eight".