442344643 has 8 divisors (see below), whose sum is σ = 501443600. Its totient is φ = 386827488.

The previous prime is 442344631. The next prime is 442344649. The reversal of 442344643 is 346443244.

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 442344643 - 2¹³ = 442336451 is a prime.

It is a super-3 number, since 3×442344643³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442344599 and 442344608.

It is not an unprimeable number, because it can be changed into a prime (442344649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895188 + ... + 895681.

It is an arithmetic number, because the mean of its divisors is an integer number (62680450).

Almost surely, 2^442344643 is an apocalyptic number.

442344643 is a deficient number, since it is larger than the sum of its proper divisors (59098957).

442344643 is a wasteful number, since it uses less digits than its factorization.

442344643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790901.

The product of its digits is 110592, while the sum is 34.

The square root of 442344643 is about 21031.9909423716. The cubic root of 442344643 is about 761.9390943621.

Adding to 442344643 its reverse (346443244), we get a palindrome (788787887).

The spelling of 442344643 in words is "four hundred forty-two million, three hundred forty-four thousand, six hundred forty-three".