117907890 has 32 divisors (see below), whose sum is σ = 295284096. Its totient is φ = 30074880.

The previous prime is 117907883. The next prime is 117907919. The reversal of 117907890 is 98709711.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84751 + ... + 86130.

It is an arithmetic number, because the mean of its divisors is an integer number (9227628).

Almost surely, 2^117907890 is an apocalyptic number.

117907890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117907890 is an abundant number, since it is smaller than the sum of its proper divisors (177376206).

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

117907890 is a wasteful number, since it uses less digits than its factorization.

117907890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170914.

The product of its (nonzero) digits is 31752, while the sum is 42.

The square root of 117907890 is about 10858.5399571029. The cubic root of 117907890 is about 490.3591563703.

The spelling of 117907890 in words is "one hundred seventeen million, nine hundred seven thousand, eight hundred ninety".