442663841 has 4 divisors (see below), whose sum is σ = 449270832. Its totient is φ = 436056852.

The previous prime is 442663829. The next prime is 442663853. The reversal of 442663841 is 148366244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (442663829) and next prime (442663853).

It is a cyclic number.

It is not a de Polignac number, because 442663841 - 2⁶ = 442663777 is a prime.

It is a super-2 number, since 2×442663841² = 391902552257746562, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442663795 and 442663804.

It is not an unprimeable number, because it can be changed into a prime (442663811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3303395 + ... + 3303528.

It is an arithmetic number, because the mean of its divisors is an integer number (112317708).

Almost surely, 2^442663841 is an apocalyptic number.

It is an amenable number.

442663841 is a deficient number, since it is larger than the sum of its proper divisors (6606991).

442663841 is an equidigital number, since it uses as much as digits as its factorization.

442663841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6606990.

The product of its digits is 110592, while the sum is 38.

The square root of 442663841 is about 21039.5779662996. The cubic root of 442663841 is about 762.1223232553.

The spelling of 442663841 in words is "four hundred forty-two million, six hundred sixty-three thousand, eight hundred forty-one".