442553839 has 12 divisors (see below), whose sum is σ = 554408904. Its totient is φ = 350151984.

The previous prime is 442553803. The next prime is 442553851. The reversal of 442553839 is 938355244.

It is not a de Polignac number, because 442553839 - 2¹⁵ = 442521071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442553795 and 442553804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442556839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346737 + ... + 348010.

It is an arithmetic number, because the mean of its divisors is an integer number (46200742).

Almost surely, 2^442553839 is an apocalyptic number.

442553839 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

442553839 is a deficient number, since it is larger than the sum of its proper divisors (111855065).

442553839 is a wasteful number, since it uses less digits than its factorization.

442553839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694774 (or 694767 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The square root of 442553839 is about 21036.9636354679. The cubic root of 442553839 is about 762.0591888726.

The spelling of 442553839 in words is "four hundred forty-two million, five hundred fifty-three thousand, eight hundred thirty-nine".