442340 has 24 divisors (see below), whose sum is σ = 984312. Its totient is φ = 166400.

The previous prime is 442333. The next prime is 442363. The reversal of 442340 is 43244.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 438244 = 64^2 + 662^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311 + ... + 990.

It is an arithmetic number, because the mean of its divisors is an integer number (41013).

2⁴⁴²³⁴⁰ is an apocalyptic number.

It is an amenable number.

442340 is an abundant number, since it is smaller than the sum of its proper divisors (541972).

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

442340 is a wasteful number, since it uses less digits than its factorization.

442340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 442340 is about 665.0864605448. The cubic root of 442340 is about 76.1936428495.

Adding to 442340 its reverse (43244), we get a palindrome (485584).

The spelling of 442340 in words is "four hundred forty-two thousand, three hundred forty", and thus it is an iban number.