8921224 has 16 divisors (see below), whose sum is σ = 18014220. Its totient is φ = 4117440.

The previous prime is 8921207. The next prime is 8921239. The reversal of 8921224 is 4221298.

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 28900 = 2982^2 + 170^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8921192 and 8921201.

It is an unprimeable number.

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, 42787 + ... + 42994.

Almost surely, 2^8921224 is an apocalyptic number.

It is an amenable number.

8921224 is an abundant number, since it is smaller than the sum of its proper divisors (9092996).

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

8921224 is a wasteful number, since it uses less digits than its factorization.

8921224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85800 (or 85796 counting only the distinct ones).

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

The square root of 8921224 is about 2986.8418103408. The cubic root of 8921224 is about 207.3997115405.

It can be divided in two parts, 892 and 1224, that added together give a square (2116 = 46²).

The spelling of 8921224 in words is "eight million, nine hundred twenty-one thousand, two hundred twenty-four".