82118385 has 24 divisors (see below), whose sum is σ = 142983360. Its totient is φ = 43598112.

The previous prime is 82118371. The next prime is 82118389. The reversal of 82118385 is 58381128.

It is not a de Polignac number, because 82118385 - 2⁶ = 82118321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82118389) 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 in 23 ways as a sum of consecutive naturals, for example, 6196 + ... + 14234.

It is an arithmetic number, because the mean of its divisors is an integer number (5957640).

Almost surely, 2^82118385 is an apocalyptic number.

It is an amenable number.

82118385 is a deficient number, since it is larger than the sum of its proper divisors (60864975).

82118385 is a wasteful number, since it uses less digits than its factorization.

82118385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8277 (or 8274 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 82118385 is about 9061.9194986493. The cubic root of 82118385 is about 434.6571217992.

The spelling of 82118385 in words is "eighty-two million, one hundred eighteen thousand, three hundred eighty-five".