117618978 has 32 divisors (see below), whose sum is σ = 243777600. Its totient is φ = 37808576.

The previous prime is 117618973. The next prime is 117618989. The reversal of 117618978 is 879816711.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117618973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15628 + ... + 21896.

It is an arithmetic number, because the mean of its divisors is an integer number (7618050).

Almost surely, 2^117618978 is an apocalyptic number.

117618978 is an abundant number, since it is smaller than the sum of its proper divisors (126158622).

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

117618978 is a wasteful number, since it uses less digits than its factorization.

117618978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386.

The product of its digits is 169344, while the sum is 48.

The square root of 117618978 is about 10845.2283516761. The cubic root of 117618978 is about 489.9583165986.

The spelling of 117618978 in words is "one hundred seventeen million, six hundred eighteen thousand, nine hundred seventy-eight".