8381320 has 16 divisors (see below), whose sum is σ = 18858060. Its totient is φ = 3352512.

The previous prime is 8381311. The next prime is 8381333. The reversal of 8381320 is 231838.

It can be written as a sum of positive squares in 2 ways, for example, as 8375236 + 6084 = 2894^2 + 78^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104727 + ... + 104806.

Almost surely, 2^8381320 is an apocalyptic number.

It is an amenable number.

8381320 is an abundant number, since it is smaller than the sum of its proper divisors (10476740).

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

8381320 is a wasteful number, since it uses less digits than its factorization.

8381320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209544 (or 209540 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 8381320 is about 2895.0509494653. The cubic root of 8381320 is about 203.1284747335.

The spelling of 8381320 in words is "eight million, three hundred eighty-one thousand, three hundred twenty".