8381312 has 16 divisors (see below), whose sum is σ = 16697400. Its totient is φ = 4190592.

The previous prime is 8381311. The next prime is 8381333. The reversal of 8381312 is 2131838.

It is a tau number, because it is divible by the number of its divisors (16).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32612 + ... + 32867.

Almost surely, 2^8381312 is an apocalyptic number.

It is an amenable number.

8381312 is a deficient number, since it is larger than the sum of its proper divisors (8316088).

8381312 is an equidigital number, since it uses as much as digits as its factorization.

8381312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65493 (or 65481 counting only the distinct ones).

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

The square root of 8381312 is about 2895.0495677967. The cubic root of 8381312 is about 203.1284101045.

The spelling of 8381312 in words is "eight million, three hundred eighty-one thousand, three hundred twelve".