442805 has 16 divisors (see below), whose sum is σ = 592704. Its totient is φ = 314880.

The previous prime is 442789. The next prime is 442807. The reversal of 442805 is 508244.

442805 = 28² + 29² + ... + 110².

It is not a de Polignac number, because 442805 - 2⁴ = 442789 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 in 15 ways as a sum of consecutive naturals, for example, 4517 + ... + 4613.

It is an arithmetic number, because the mean of its divisors is an integer number (37044).

2⁴⁴²⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

442805 is a deficient number, since it is larger than the sum of its proper divisors (149899).

442805 is a wasteful number, since it uses less digits than its factorization.

442805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 442805 is about 665.4359473308. The cubic root of 442805 is about 76.2203324519.

The spelling of 442805 in words is "four hundred forty-two thousand, eight hundred five".