117309828078 has 24 divisors (see below), whose sum is σ = 261040790088. Its totient is φ = 38046430512.

The previous prime is 117309828071. The next prime is 117309828121. The reversal of 117309828078 is 870828903711.

It is a happy number.

117309828078 is a `hidden beast` number, since 117 + 309 + 82 + 80 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117309828071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88069776 + ... + 88071107.

It is an arithmetic number, because the mean of its divisors is an integer number (10876699587).

Almost surely, 2^117309828078 is an apocalyptic number.

117309828078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

117309828078 is an abundant number, since it is smaller than the sum of its proper divisors (143730962010).

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

117309828078 is a wasteful number, since it uses less digits than its factorization.

117309828078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176140928 (or 176140925 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The spelling of 117309828078 in words is "one hundred seventeen billion, three hundred nine million, eight hundred twenty-eight thousand, seventy-eight".