442804 has 12 divisors (see below), whose sum is σ = 800128. Its totient is φ = 214200.

The previous prime is 442789. The next prime is 442807. The reversal of 442804 is 408244.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442807) by changing a digit.

442804 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662 + ... + 1909.

2⁴⁴²⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

442804 is a deficient number, since it is larger than the sum of its proper divisors (357324).

442804 is a wasteful number, since it uses less digits than its factorization.

442804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606 (or 3604 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 442804 is about 665.4351959432. The cubic root of 442804 is about 76.2202750750.

The spelling of 442804 in words is "four hundred forty-two thousand, eight hundred four".