8389381 has 48 divisors (see below), whose sum is σ = 12378240. Its totient is φ = 5483520.

The previous prime is 8389373. The next prime is 8389441. The reversal of 8389381 is 1839838.

It is not a de Polignac number, because 8389381 - 2³ = 8389373 is a prime.

It is a super-2 number, since 2×8389381² = 140763427126322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8389301) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 289275 + ... + 289303.

It is an arithmetic number, because the mean of its divisors is an integer number (257880).

Almost surely, 2^8389381 is an apocalyptic number.

It is an amenable number.

8389381 is a deficient number, since it is larger than the sum of its proper divisors (3988859).

8389381 is a wasteful number, since it uses less digits than its factorization.

8389381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 77 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 8389381 is about 2896.4428183550. The cubic root of 8389381 is about 203.1935756153.

The spelling of 8389381 in words is "eight million, three hundred eighty-nine thousand, three hundred eighty-one".