819224 has 16 divisors (see below), whose sum is σ = 1755600. Its totient is φ = 351072.

The previous prime is 819187. The next prime is 819229. The reversal of 819224 is 422918.

It is a super-2 number, since 2×819224² = 1342255924352, which contains 22 as substring.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 819193 and 819202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7259 + ... + 7370.

It is an arithmetic number, because the mean of its divisors is an integer number (109725).

2⁸¹⁹²²⁴ is an apocalyptic number.

It is an amenable number.

819224 is an abundant number, since it is smaller than the sum of its proper divisors (936376).

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

819224 is a wasteful number, since it uses less digits than its factorization.

819224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14642 (or 14638 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 819224 is about 905.1099380738. The cubic root of 819224 is about 93.5694813694.

The spelling of 819224 in words is "eight hundred nineteen thousand, two hundred twenty-four".