442766 has 8 divisors (see below), whose sum is σ = 670680. Its totient is φ = 219208.

The previous prime is 442763. The next prime is 442769. The reversal of 442766 is 667244.

It is an interprime number because it is at equal distance from previous prime (442763) and next prime (442769).

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

It is a plaindrome in base 13.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442766.

It is not an unprimeable number, because it can be changed into a prime (442763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821 + ... + 1248.

It is an arithmetic number, because the mean of its divisors is an integer number (83835).

2⁴⁴²⁷⁶⁶ is an apocalyptic number.

442766 is a deficient number, since it is larger than the sum of its proper divisors (227914).

442766 is a wasteful number, since it uses less digits than its factorization.

442766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178.

The product of its digits is 8064, while the sum is 29.

The square root of 442766 is about 665.4066425878. The cubic root of 442766 is about 76.2180946872.

The spelling of 442766 in words is "four hundred forty-two thousand, seven hundred sixty-six".