442189 has 8 divisors (see below), whose sum is σ = 491040. Its totient is φ = 394800.

The previous prime is 442181. The next prime is 442193. The reversal of 442189 is 981244.

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

It is a cyclic number.

It is not a de Polignac number, because 442189 - 2³ = 442181 is a prime.

It is a super-2 number, since 2×442189² = 391062223442, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342 + ... + 1000.

It is an arithmetic number, because the mean of its divisors is an integer number (61380).

2⁴⁴²¹⁸⁹ is an apocalyptic number.

It is an amenable number.

442189 is a deficient number, since it is larger than the sum of its proper divisors (48851).

442189 is a wasteful number, since it uses less digits than its factorization.

442189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its digits is 2304, while the sum is 28.

The square root of 442189 is about 664.9729317799. The cubic root of 442189 is about 76.1849718804.

It can be divided in two parts, 442 and 189, that multiplied together give a palindrome (83538).

The spelling of 442189 in words is "four hundred forty-two thousand, one hundred eighty-nine".