442918 has 16 divisors (see below), whose sum is σ = 804384. Its totient is φ = 178560.

The previous prime is 442903. The next prime is 442919. The reversal of 442918 is 819244.

442918 is a modest number, since divided by 918 gives 442 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442919) by changing a digit.

442918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (50274).

2⁴⁴²⁹¹⁸ is an apocalyptic number.

442918 is a deficient number, since it is larger than the sum of its proper divisors (361466).

442918 is a wasteful number, since it uses less digits than its factorization.

442918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887.

The product of its digits is 2304, while the sum is 28.

The square root of 442918 is about 665.5208486592. The cubic root of 442918 is about 76.2268154900.

The spelling of 442918 in words is "four hundred forty-two thousand, nine hundred eighteen".