42185188 has 12 divisors (see below), whose sum is σ = 73987452. Its totient is φ = 21045920.

The previous prime is 42185159. The next prime is 42185219. The reversal of 42185188 is 88158124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26440164 + 15745024 = 5142^2 + 3968^2 .

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, 9595 + ... + 13282.

It is an arithmetic number, because the mean of its divisors is an integer number (6165621).

Almost surely, 2^42185188 is an apocalyptic number.

It is an amenable number.

42185188 is a deficient number, since it is larger than the sum of its proper divisors (31802264).

42185188 is a wasteful number, since it uses less digits than its factorization.

42185188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23342 (or 23340 counting only the distinct ones).

The product of its digits is 20480, while the sum is 37.

The square root of 42185188 is about 6495.0125481018. The cubic root of 42185188 is about 348.1128030843.

The spelling of 42185188 in words is "forty-two million, one hundred eighty-five thousand, one hundred eighty-eight".