117978306 has 16 divisors (see below), whose sum is σ = 236251200. Its totient is φ = 39277008.

The previous prime is 117978299. The next prime is 117978337. The reversal of 117978306 is 603879711.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6886 + ... + 16833.

It is an arithmetic number, because the mean of its divisors is an integer number (14765700).

Almost surely, 2^117978306 is an apocalyptic number.

117978306 is an abundant number, since it is smaller than the sum of its proper divisors (118272894).

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

117978306 is a wasteful number, since it uses less digits than its factorization.

117978306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24553.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 117978306 is about 10861.7818980129. The cubic root of 117978306 is about 490.4567530590.

The spelling of 117978306 in words is "one hundred seventeen million, nine hundred seventy-eight thousand, three hundred six".