42228388 has 12 divisors (see below), whose sum is σ = 74396700. Its totient is φ = 20972192.

The previous prime is 42228371. The next prime is 42228421. The reversal of 42228388 is 88382224.

It can be written as a sum of positive squares in 2 ways, for example, as 20994724 + 21233664 = 4582^2 + 4608^2 .

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, 34831 + ... + 36022.

It is an arithmetic number, because the mean of its divisors is an integer number (6199725).

Almost surely, 2^42228388 is an apocalyptic number.

It is an amenable number.

42228388 is a deficient number, since it is larger than the sum of its proper divisors (32168312).

42228388 is a wasteful number, since it uses less digits than its factorization.

42228388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71006 (or 71004 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 42228388 is about 6498.3373258088. The cubic root of 42228388 is about 348.2315915604.

The spelling of 42228388 in words is "forty-two million, two hundred twenty-eight thousand, three hundred eighty-eight".