117385218 has 12 divisors (see below), whose sum is σ = 254334678. Its totient is φ = 39128400.

The previous prime is 117385217. The next prime is 117385253. The reversal of 117385218 is 812583711.

It can be written as a sum of positive squares in only one way, i.e., 117353889 + 31329 = 10833^2 + 177^2 .

It is not an unprimeable number, because it can be changed into a prime (117385217) 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 5 ways as a sum of consecutive naturals, for example, 3260683 + ... + 3260718.

Almost surely, 2^117385218 is an apocalyptic number.

117385218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

117385218 is an abundant number, since it is smaller than the sum of its proper divisors (136949460).

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

117385218 is a wasteful number, since it uses less digits than its factorization.

117385218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521409 (or 6521406 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 117385218 is about 10834.4459018447. The cubic root of 117385218 is about 489.6335146624.

The spelling of 117385218 in words is "one hundred seventeen million, three hundred eighty-five thousand, two hundred eighteen".