442856 has 16 divisors (see below), whose sum is σ = 837540. Its totient is φ = 219520.

The previous prime is 442843. The next prime is 442861. The reversal of 442856 is 658244.

It can be written as a sum of positive squares in 2 ways, for example, as 372100 + 70756 = 610^2 + 266^2 .

It is a super-2 number, since 2×442856² = 392242873472, which contains 22 as substring.

Its product of digits (7680) is a multiple of the sum of its prime divisors (480).

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436 + ... + 1716.

2⁴⁴²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

442856 is a deficient number, since it is larger than the sum of its proper divisors (394684).

442856 is a wasteful number, since it uses less digits than its factorization.

442856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 480 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 442856 is about 665.4742669706. The cubic root of 442856 is about 76.2232585614.

The spelling of 442856 in words is "four hundred forty-two thousand, eight hundred fifty-six".