442784 has 24 divisors (see below), whose sum is σ = 886788. Its totient is φ = 217600.

The previous prime is 442781. The next prime is 442789. The reversal of 442784 is 487244.

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 48400 = 628^2 + 220^2 .

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 442784.

It is not an unprimeable number, because it can be changed into a prime (442781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3164 + ... + 3300.

2⁴⁴²⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

442784 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

442784 is a wasteful number, since it uses less digits than its factorization.

442784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 240 counting only the distinct ones).

The product of its digits is 7168, while the sum is 29.

The square root of 442784 is about 665.4201680142. The cubic root of 442784 is about 76.2191275180.

It can be divided in two parts, 442 and 784, that multiplied together give a triangular number (346528 = T₈₃₂).

The spelling of 442784 in words is "four hundred forty-two thousand, seven hundred eighty-four".