442812 has 12 divisors (see below), whose sum is σ = 1033256. Its totient is φ = 147600.

The previous prime is 442807. The next prime is 442817. The reversal of 442812 is 218244.

It is an interprime number because it is at equal distance from previous prime (442807) and next prime (442817).

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

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 442812.

It is not an unprimeable number, because it can be changed into a prime (442817) 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, 18439 + ... + 18462.

2⁴⁴²⁸¹² is an apocalyptic number.

It is an amenable number.

442812 is an abundant number, since it is smaller than the sum of its proper divisors (590444).

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

442812 is a wasteful number, since it uses less digits than its factorization.

442812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36908 (or 36906 counting only the distinct ones).

The product of its digits is 512, while the sum is 21.

The square root of 442812 is about 665.4412070198. The cubic root of 442812 is about 76.2207340881.

The spelling of 442812 in words is "four hundred forty-two thousand, eight hundred twelve".