442360665 has 12 divisors (see below), whose sum is σ = 766758564. Its totient is φ = 235925664.

The previous prime is 442360661. The next prime is 442360673. The reversal of 442360665 is 566063244.

442360665 is a `hidden beast` number, since 4 + 42 + 3 + 606 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 343397961 + 98962704 = 18531^2 + 9948^2 .

It is not a de Polignac number, because 442360665 - 2² = 442360661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442360661) 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, 4915074 + ... + 4915163.

It is an arithmetic number, because the mean of its divisors is an integer number (63896547).

Almost surely, 2^442360665 is an apocalyptic number.

442360665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

442360665 is a deficient number, since it is larger than the sum of its proper divisors (324397899).

442360665 is a wasteful number, since it uses less digits than its factorization.

442360665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9830248 (or 9830245 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 442360665 is about 21032.3718348645. The cubic root of 442360665 is about 761.9482935547.

The spelling of 442360665 in words is "four hundred forty-two million, three hundred sixty thousand, six hundred sixty-five".