442189668 has 12 divisors (see below), whose sum is σ = 1031775920. Its totient is φ = 147396552.

The previous prime is 442189667. The next prime is 442189687. The reversal of 442189668 is 866981244.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (442189661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18424558 + ... + 18424581.

Almost surely, 2^442189668 is an apocalyptic number.

It is an amenable number.

442189668 is an abundant number, since it is smaller than the sum of its proper divisors (589586252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442189668 is a wasteful number, since it uses less digits than its factorization.

442189668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36849146 (or 36849144 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 442189668 is about 21028.3063512019. The cubic root of 442189668 is about 761.8501024372.

The spelling of 442189668 in words is "four hundred forty-two million, one hundred eighty-nine thousand, six hundred sixty-eight".