442819 has 8 divisors (see below), whose sum is σ = 497952. Its totient is φ = 390720.

The previous prime is 442817. The next prime is 442823. The reversal of 442819 is 918244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442819 - 2¹ = 442817 is a prime.

It is a super-2 number, since 2×442819² = 392177333522, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 442 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (62244).

2⁴⁴²⁸¹⁹ is an apocalyptic number.

442819 is a deficient number, since it is larger than the sum of its proper divisors (55133).

442819 is a wasteful number, since it uses less digits than its factorization.

442819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517.

The product of its digits is 2304, while the sum is 28.

The square root of 442819 is about 665.4464666673. The cubic root of 442819 is about 76.2211357200.

The spelling of 442819 in words is "four hundred forty-two thousand, eight hundred nineteen".