442168868 has 6 divisors (see below), whose sum is σ = 773795526. Its totient is φ = 221084432.

The previous prime is 442168847. The next prime is 442168873. The reversal of 442168868 is 868861244.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 286218724 + 155950144 = 16918^2 + 12488^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55271105 + ... + 55271112.

It is an arithmetic number, because the mean of its divisors is an integer number (128965921).

Almost surely, 2^442168868 is an apocalyptic number.

It is an amenable number.

442168868 is a deficient number, since it is larger than the sum of its proper divisors (331626658).

442168868 is a wasteful number, since it uses less digits than its factorization.

442168868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110542221 (or 110542219 counting only the distinct ones).

The product of its digits is 589824, while the sum is 47.

The square root of 442168868 is about 21027.8117739341. The cubic root of 442168868 is about 761.8381567860.

The spelling of 442168868 in words is "four hundred forty-two million, one hundred sixty-eight thousand, eight hundred sixty-eight".