8381864 has 16 divisors (see below), whose sum is σ = 15767700. Its totient is φ = 4177152.

The previous prime is 8381843. The next prime is 8381881. The reversal of 8381864 is 4681838.

It can be written as a sum of positive squares in 2 ways, for example, as 7672900 + 708964 = 2770^2 + 842^2 .

It is a super-2 number, since 2×8381864² = 140511288228992, which contains 22 as substring.

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, 1142 + ... + 4250.

Almost surely, 2^8381864 is an apocalyptic number.

It is an amenable number.

8381864 is a deficient number, since it is larger than the sum of its proper divisors (7385836).

8381864 is a wasteful number, since it uses less digits than its factorization.

8381864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452 (or 3448 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 8381864 is about 2895.1449013823. The cubic root of 8381864 is about 203.1328694072.

The spelling of 8381864 in words is "eight million, three hundred eighty-one thousand, eight hundred sixty-four".