42186568 has 16 divisors (see below), whose sum is σ = 79431660. Its totient is φ = 21004800.

The previous prime is 42186559. The next prime is 42186601. The reversal of 42186568 is 86568124.

It can be written as a sum of positive squares in 2 ways, for example, as 40220964 + 1965604 = 6342^2 + 1402^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42186568.

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, 9013 + ... + 12868.

Almost surely, 2^42186568 is an apocalyptic number.

It is an amenable number.

42186568 is a deficient number, since it is larger than the sum of its proper divisors (37245092).

42186568 is a wasteful number, since it uses less digits than its factorization.

42186568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22128 (or 22124 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 42186568 is about 6495.1187825936. The cubic root of 42186568 is about 348.1165989698.

The spelling of 42186568 in words is "forty-two million, one hundred eighty-six thousand, five hundred sixty-eight".