442639775 has 6 divisors (see below), whose sum is σ = 548873352. Its totient is φ = 354111800.

The previous prime is 442639763. The next prime is 442639777. The reversal of 442639775 is 577936244.

It is not a de Polignac number, because 442639775 - 2⁴ = 442639759 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 (442639777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8852771 + ... + 8852820.

It is an arithmetic number, because the mean of its divisors is an integer number (91478892).

Almost surely, 2^442639775 is an apocalyptic number.

442639775 is a deficient number, since it is larger than the sum of its proper divisors (106233577).

442639775 is a wasteful number, since it uses less digits than its factorization.

442639775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17705601 (or 17705596 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 47.

The square root of 442639775 is about 21039.0060364077. The cubic root of 442639775 is about 762.1085117453.

The spelling of 442639775 in words is "four hundred forty-two million, six hundred thirty-nine thousand, seven hundred seventy-five".