818442 has 24 divisors (see below), whose sum is σ = 1818180. Its totient is φ = 265920.

The previous prime is 818429. The next prime is 818453. The reversal of 818442 is 244818.

818442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 549081 + 269361 = 741^2 + 519^2 .

It is a plaindrome in base 15.

It is an unprimeable number.

818442 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 11 ways as a sum of consecutive naturals, for example, 184 + ... + 1292.

2⁸¹⁸⁴⁴² is an apocalyptic number.

818442 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

818442 is an abundant number, since it is smaller than the sum of its proper divisors (999738).

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

818442 is a wasteful number, since it uses less digits than its factorization.

818442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158 (or 1155 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 818442 is about 904.6778432127. The cubic root of 818442 is about 93.5396992712.

The spelling of 818442 in words is "eight hundred eighteen thousand, four hundred forty-two".