442644242 has 8 divisors (see below), whose sum is σ = 664419132. Its totient is φ = 221171200.

The previous prime is 442644221. The next prime is 442644247. The reversal of 442644242 is 242446244.

It can be written as a sum of positive squares in 2 ways, for example, as 429691441 + 12952801 = 20729^2 + 3599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 442644199 and 442644208.

It is not an unprimeable number, because it can be changed into a prime (442644247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71759 + ... + 77682.

Almost surely, 2^442644242 is an apocalyptic number.

442644242 is a deficient number, since it is larger than the sum of its proper divisors (221774890).

442644242 is a wasteful number, since it uses less digits than its factorization.

442644242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150924.

The product of its digits is 49152, while the sum is 32.

The square root of 442644242 is about 21039.1121960980. The cubic root of 442644242 is about 762.1110754005. Note that the first 3 decimals are identical.

The spelling of 442644242 in words is "four hundred forty-two million, six hundred forty-four thousand, two hundred forty-two".