442866 has 16 divisors (see below), whose sum is σ = 914688. Its totient is φ = 142800.

The previous prime is 442861. The next prime is 442879. The reversal of 442866 is 668244.

It is a super-2 number, since 2×442866² = 392260587912, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 3 and base 9.

It is not an unprimeable number, because it can be changed into a prime (442861) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (57168).

2⁴⁴²⁸⁶⁶ is an apocalyptic number.

442866 is an abundant number, since it is smaller than the sum of its proper divisors (471822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442866 is a wasteful number, since it uses less digits than its factorization.

442866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417.

The product of its digits is 9216, while the sum is 30.

The square root of 442866 is about 665.4817803667. The cubic root of 442866 is about 76.2238322820.

The spelling of 442866 in words is "four hundred forty-two thousand, eight hundred sixty-six".