918224 has 10 divisors (see below), whose sum is σ = 1779090. Its totient is φ = 459104.

The previous prime is 918223. The next prime is 918257. The reversal of 918224 is 422819.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 71824 = 920^2 + 268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 918193 and 918202.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 918224.

It is not an unprimeable number, because it can be changed into a prime (918223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28679 + ... + 28710.

It is an arithmetic number, because the mean of its divisors is an integer number (177909).

2⁹¹⁸²²⁴ is an apocalyptic number.

It is an amenable number.

918224 is a deficient number, since it is larger than the sum of its proper divisors (860866).

918224 is a wasteful number, since it uses less digits than its factorization.

918224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57397 (or 57391 counting only the distinct ones).

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

The square root of 918224 is about 958.2400534313. The cubic root of 918224 is about 97.1962583306.

The spelling of 918224 in words is "nine hundred eighteen thousand, two hundred twenty-four".