442885 has 8 divisors (see below), whose sum is σ = 537336. Its totient is φ = 350400.

The previous prime is 442879. The next prime is 442903. The reversal of 442885 is 588244.

It can be written as a sum of positive squares in 4 ways, for example, as 229441 + 213444 = 479^2 + 462^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442885 - 2¹⁵ = 410117 is a prime.

It is a super-2 number, since 2×442885² = 392294246450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4⁷ + 4⁹ + 8³ + 2¹⁷ + 8⁵ + 5 .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67 + ... + 943.

It is an arithmetic number, because the mean of its divisors is an integer number (67167).

2⁴⁴²⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

442885 is a deficient number, since it is larger than the sum of its proper divisors (94451).

442885 is a wasteful number, since it uses less digits than its factorization.

442885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983.

The product of its digits is 10240, while the sum is 31.

The square root of 442885 is about 665.4960555856. The cubic root of 442885 is about 76.2249223274.

It can be divided in two parts, 442 and 885, that multiplied together give a triangular number (391170 = T₈₈₄).

The spelling of 442885 in words is "four hundred forty-two thousand, eight hundred eighty-five".