442306 has 8 divisors (see below), whose sum is σ = 702540. Its totient is φ = 208128.

The previous prime is 442291. The next prime is 442319. The reversal of 442306 is 603244.

It can be written as a sum of positive squares in 2 ways, for example, as 442225 + 81 = 665^2 + 9^2 .

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

It is a congruent number.

It is an unprimeable number.

442306 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, 6471 + ... + 6538.

2⁴⁴²³⁰⁶ is an apocalyptic number.

442306 is a deficient number, since it is larger than the sum of its proper divisors (260234).

442306 is a wasteful number, since it uses less digits than its factorization.

442306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13028.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 442306 is about 665.0608994671. The cubic root of 442306 is about 76.1916906180.

The spelling of 442306 in words is "four hundred forty-two thousand, three hundred six".