442438 has 4 divisors (see below), whose sum is σ = 663660. Its totient is φ = 221218.

The previous prime is 442399. The next prime is 442439. The reversal of 442438 is 834244.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442439) 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 as a sum of consecutive naturals, namely, 110608 + ... + 110611.

It is an arithmetic number, because the mean of its divisors is an integer number (165915).

2⁴⁴²⁴³⁸ is an apocalyptic number.

442438 is a deficient number, since it is larger than the sum of its proper divisors (221222).

442438 is a wasteful number, since it uses less digits than its factorization.

442438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221221.

The product of its digits is 3072, while the sum is 25.

The square root of 442438 is about 665.1601310963. The cubic root of 442438 is about 76.1992693101.

The spelling of 442438 in words is "four hundred forty-two thousand, four hundred thirty-eight".