42668318 has 24 divisors (see below), whose sum is σ = 81222264. Its totient is φ = 16623600.

The previous prime is 42668303. The next prime is 42668321. The reversal of 42668318 is 81386624.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 18713 + ... + 20868.

It is an arithmetic number, because the mean of its divisors is an integer number (3384261).

Almost surely, 2^42668318 is an apocalyptic number.

42668318 is a deficient number, since it is larger than the sum of its proper divisors (38553946).

42668318 is a wasteful number, since it uses less digits than its factorization.

42668318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39608 (or 39601 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 42668318 is about 6532.0990500757. The cubic root of 42668318 is about 349.4366938756.

The spelling of 42668318 in words is "forty-two million, six hundred sixty-eight thousand, three hundred eighteen".