442618 has 24 divisors (see below), whose sum is σ = 766080. Its totient is φ = 191400.

The previous prime is 442609. The next prime is 442619. The reversal of 442618 is 816244.

It is a junction number, because it is equal to n+sod(n) for n = 442592 and 442601.

It is not an unprimeable number, because it can be changed into a prime (442619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7473 + ... + 7531.

It is an arithmetic number, because the mean of its divisors is an integer number (31920).

2⁴⁴²⁶¹⁸ is an apocalyptic number.

442618 is a deficient number, since it is larger than the sum of its proper divisors (323462).

442618 is a wasteful number, since it uses less digits than its factorization.

442618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 103 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 442618 is about 665.2954231016. The cubic root of 442618 is about 76.2096014612.

It can be divided in two parts, 4426 and 18, that added together give a palindrome (4444).

The spelling of 442618 in words is "four hundred forty-two thousand, six hundred eighteen".