818224 has 20 divisors (see below), whose sum is σ = 1729800. Its totient is φ = 371840.

The previous prime is 818219. The next prime is 818231. The reversal of 818224 is 422818.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is an unprimeable number.

818224 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 3 ways as a sum of consecutive naturals, for example, 2149 + ... + 2500.

It is an arithmetic number, because the mean of its divisors is an integer number (86490).

2⁸¹⁸²²⁴ is an apocalyptic number.

It is an amenable number.

818224 is an abundant number, since it is smaller than the sum of its proper divisors (911576).

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

818224 is a wasteful number, since it uses less digits than its factorization.

818224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668 (or 4662 counting only the distinct ones).

The product of its digits is 1024, while the sum is 25.

The square root of 818224 is about 904.5573503101. The cubic root of 818224 is about 93.5313934636.

The spelling of 818224 in words is "eight hundred eighteen thousand, two hundred twenty-four".