442808 has 8 divisors (see below), whose sum is σ = 830280. Its totient is φ = 221400.

The previous prime is 442807. The next prime is 442817. The reversal of 442808 is 808244.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 14.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27668 + ... + 27683.

It is an arithmetic number, because the mean of its divisors is an integer number (103785).

2⁴⁴²⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

442808 is a deficient number, since it is larger than the sum of its proper divisors (387472).

442808 is a wasteful number, since it uses less digits than its factorization.

442808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55357 (or 55353 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 442808 is about 665.4382014883. The cubic root of 442808 is about 76.2205045822.

The spelling of 442808 in words is "four hundred forty-two thousand, eight hundred eight".