117866138 has 8 divisors (see below), whose sum is σ = 190399188. Its totient is φ = 54399744.

The previous prime is 117866137. The next prime is 117866141. The reversal of 117866138 is 831668711.

It can be written as a sum of positive squares in 2 ways, for example, as 112635769 + 5230369 = 10613^2 + 2287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 117866095 and 117866104.

It is not an unprimeable number, because it can be changed into a prime (117866137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2266631 + ... + 2266682.

Almost surely, 2^117866138 is an apocalyptic number.

117866138 is a deficient number, since it is larger than the sum of its proper divisors (72533050).

117866138 is a wasteful number, since it uses less digits than its factorization.

117866138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4533328.

The product of its digits is 48384, while the sum is 41.

The square root of 117866138 is about 10856.6172447959. The cubic root of 117866138 is about 490.3012696799.

The spelling of 117866138 in words is "one hundred seventeen million, eight hundred sixty-six thousand, one hundred thirty-eight".