442631605 has 8 divisors (see below), whose sum is σ = 572016312. Its totient is φ = 326866368.

The previous prime is 442631603. The next prime is 442631633. The reversal of 442631605 is 506136244.

It can be written as a sum of positive squares in 4 ways, for example, as 28793956 + 413837649 = 5366^2 + 20343^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 442631605 - 2¹ = 442631603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442631603) 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 7 ways as a sum of consecutive naturals, for example, 3404794 + ... + 3404923.

It is an arithmetic number, because the mean of its divisors is an integer number (71502039).

Almost surely, 2^442631605 is an apocalyptic number.

It is an amenable number.

442631605 is a deficient number, since it is larger than the sum of its proper divisors (129384707).

442631605 is a wasteful number, since it uses less digits than its factorization.

442631605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809735.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 442631605 is about 21038.8118723468. The cubic root of 442631605 is about 762.1038228574.

Adding to 442631605 its reverse (506136244), we get a palindrome (948767849).

The spelling of 442631605 in words is "four hundred forty-two million, six hundred thirty-one thousand, six hundred five".