442536 has 16 divisors (see below), whose sum is σ = 1106400. Its totient is φ = 147504.

The previous prime is 442531. The next prime is 442537. The reversal of 442536 is 635244.

It is a super-2 number, since 2×442536² = 391676222592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 18439 = 442536 / (4 + 4 + 2 + 5 + 3 + 6).

It is not an unprimeable number, because it can be changed into a prime (442531) 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, 9196 + ... + 9243.

It is an arithmetic number, because the mean of its divisors is an integer number (69150).

2⁴⁴²⁵³⁶ is an apocalyptic number.

It is an amenable number.

442536 is an abundant number, since it is smaller than the sum of its proper divisors (663864).

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

442536 is a wasteful number, since it uses less digits than its factorization.

442536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18448 (or 18444 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 442536 is about 665.2337934892. The cubic root of 442536 is about 76.2048949398.

The spelling of 442536 in words is "four hundred forty-two thousand, five hundred thirty-six".