8381224 has 8 divisors (see below), whose sum is σ = 15714810. Its totient is φ = 4190608.

The previous prime is 8381209. The next prime is 8381227. The reversal of 8381224 is 4221838.

It can be written as a sum of positive squares in only one way, i.e., 7193124 + 1188100 = 2682^2 + 1090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8381192 and 8381201.

It is not an unprimeable number, because it can be changed into a prime (8381227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523819 + ... + 523834.

Almost surely, 2^8381224 is an apocalyptic number.

It is an amenable number.

8381224 is a deficient number, since it is larger than the sum of its proper divisors (7333586).

8381224 is a wasteful number, since it uses less digits than its factorization.

8381224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047659 (or 1047655 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 8381224 is about 2895.0343693987. The cubic root of 8381224 is about 203.1276991831.

The spelling of 8381224 in words is "eight million, three hundred eighty-one thousand, two hundred twenty-four".