442342881 has 12 divisors (see below), whose sum is σ = 656208852. Its totient is φ = 286924896.

The previous prime is 442342871. The next prime is 442342889. The reversal of 442342881 is 188243244.

It can be written as a sum of positive squares in 2 ways, for example, as 203918400 + 238424481 = 14280^2 + 15441^2 .

It is a de Polignac number, because none of the positive numbers 2^k-442342881 is a prime.

It is a super-2 number, since 2×442342881² = 391334448742760322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442342889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663846 + ... + 664511.

It is an arithmetic number, because the mean of its divisors is an integer number (54684071).

Almost surely, 2^442342881 is an apocalyptic number.

It is an amenable number.

442342881 is a deficient number, since it is larger than the sum of its proper divisors (213865971).

442342881 is a wasteful number, since it uses less digits than its factorization.

442342881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328400 (or 1328397 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 442342881 is about 21031.9490537610. The cubic root of 442342881 is about 761.9380826785.

The spelling of 442342881 in words is "four hundred forty-two million, three hundred forty-two thousand, eight hundred eighty-one".