442864444 has 12 divisors (see below), whose sum is σ = 845468568. Its totient is φ = 201302000.

The previous prime is 442864403. The next prime is 442864447. The reversal of 442864444 is 444468244.

It is a super-2 number, since 2×442864444² = 392257831518858272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442864397 and 442864406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442864447) 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, 5032507 + ... + 5032594.

It is an arithmetic number, because the mean of its divisors is an integer number (70455714).

Almost surely, 2^442864444 is an apocalyptic number.

442864444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

442864444 is a deficient number, since it is larger than the sum of its proper divisors (402604124).

442864444 is a wasteful number, since it uses less digits than its factorization.

442864444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10065116 (or 10065114 counting only the distinct ones).

The product of its digits is 393216, while the sum is 40.

The square root of 442864444 is about 21044.3447035065. The cubic root of 442864444 is about 762.2374301166.

The spelling of 442864444 in words is "four hundred forty-two million, eight hundred sixty-four thousand, four hundred forty-four".