442386 has 24 divisors (see below), whose sum is σ = 1095744. Its totient is φ = 126360.

The previous prime is 442367. The next prime is 442397. The reversal of 442386 is 683244.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1630 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (45656).

442386 is a Friedman number, since it can be written as 4*((8*6)^3+4)+2, using all its digits and the basic arithmetic operations.

2⁴⁴²³⁸⁶ is an apocalyptic number.

442386 is an abundant number, since it is smaller than the sum of its proper divisors (653358).

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

442386 is a wasteful number, since it uses less digits than its factorization.

442386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3526 (or 3523 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 442386 is about 665.1210416157. The cubic root of 442386 is about 76.1962839447.

It can be divided in two parts, 44238 and 6, that added together give a palindrome (44244).

The spelling of 442386 in words is "four hundred forty-two thousand, three hundred eighty-six".