117905388 has 12 divisors (see below), whose sum is σ = 275112600. Its totient is φ = 39301792.

The previous prime is 117905377. The next prime is 117905399. The reversal of 117905388 is 883509711.

It is an interprime number because it is at equal distance from previous prime (117905377) and next prime (117905399).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4912713 + ... + 4912736.

It is an arithmetic number, because the mean of its divisors is an integer number (22926050).

Almost surely, 2^117905388 is an apocalyptic number.

It is an amenable number.

117905388 is an abundant number, since it is smaller than the sum of its proper divisors (157207212).

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

117905388 is a wasteful number, since it uses less digits than its factorization.

117905388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9825456 (or 9825454 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 117905388 is about 10858.4247476326. The cubic root of 117905388 is about 490.3556878795.

The spelling of 117905388 in words is "one hundred seventeen million, nine hundred five thousand, three hundred eighty-eight".