442889 has 4 divisors (see below), whose sum is σ = 445200. Its totient is φ = 440580.

The previous prime is 442879. The next prime is 442903. The reversal of 442889 is 988244.

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 a cyclic number.

It is not a de Polignac number, because 442889 - 2⁸ = 442633 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 4⁹ + 8³ + 2¹⁷ + 8⁵ + 9 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442829) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 839 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (111300).

2⁴⁴²⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

442889 is a deficient number, since it is larger than the sum of its proper divisors (2311).

442889 is a wasteful number, since it uses less digits than its factorization.

442889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310.

The product of its digits is 18432, while the sum is 35.

The square root of 442889 is about 665.4990608558. The cubic root of 442889 is about 76.2251518067.

It can be divided in two parts, 442 and 889, that added together give a palindrome (1331).

The spelling of 442889 in words is "four hundred forty-two thousand, eight hundred eighty-nine".