442783 has 4 divisors (see below), whose sum is σ = 483048. Its totient is φ = 402520.

The previous prime is 442781. The next prime is 442789. The reversal of 442783 is 387244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442783 - 2¹ = 442781 is a prime.

It is a Duffinian number.

It is a congruent number.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20116 + ... + 20137.

It is an arithmetic number, because the mean of its divisors is an integer number (120762).

2⁴⁴²⁷⁸³ is an apocalyptic number.

442783 is a deficient number, since it is larger than the sum of its proper divisors (40265).

442783 is a wasteful number, since it uses less digits than its factorization.

442783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40264.

The product of its digits is 5376, while the sum is 28.

The square root of 442783 is about 665.4194166088. The cubic root of 442783 is about 76.2190701393.

It can be divided in two parts, 442 and 783, that added together give a triangular number (1225 = T₄₉).

The spelling of 442783 in words is "four hundred forty-two thousand, seven hundred eighty-three".