442168866 has 24 divisors (see below), whose sum is σ = 958424844. Its totient is φ = 147329280.

The previous prime is 442168847. The next prime is 442168873. The reversal of 442168866 is 668861244.

It can be written as a sum of positive squares in 2 ways, for example, as 363474225 + 78694641 = 19065^2 + 8871^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72246 + ... + 78126.

Almost surely, 2^442168866 is an apocalyptic number.

442168866 is an abundant number, since it is smaller than the sum of its proper divisors (516255978).

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

442168866 is a wasteful number, since it uses less digits than its factorization.

442168866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10066 (or 10063 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 442168866 is about 21027.8117263780. The cubic root of 442168866 is about 761.8381556373.

The spelling of 442168866 in words is "four hundred forty-two million, one hundred sixty-eight thousand, eight hundred sixty-six".