442668 has 24 divisors (see below), whose sum is σ = 1061872. Its totient is φ = 143424.

The previous prime is 442633. The next prime is 442691. The reversal of 442668 is 866244.

It is an unprimeable number.

442668 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 7 ways as a sum of consecutive naturals, for example, 55 + ... + 942.

2⁴⁴²⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

442668 is an abundant number, since it is smaller than the sum of its proper divisors (619204).

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

442668 is a wasteful number, since it uses less digits than its factorization.

442668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1039 counting only the distinct ones).

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

The square root of 442668 is about 665.3329993319. The cubic root of 442668 is about 76.2124710060.

The spelling of 442668 in words is "four hundred forty-two thousand, six hundred sixty-eight".