117989988 has 24 divisors (see below), whose sum is σ = 276014592. Its totient is φ = 39229344.

The previous prime is 117989983. The next prime is 117990007. The reversal of 117989988 is 889989711.

It is not an unprimeable number, because it can be changed into a prime (117989983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7620 + ... + 17147.

It is an arithmetic number, because the mean of its divisors is an integer number (11500608).

Almost surely, 2^117989988 is an apocalyptic number.

It is an amenable number.

117989988 is an abundant number, since it is smaller than the sum of its proper divisors (158024604).

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

117989988 is a wasteful number, since it uses less digits than its factorization.

117989988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25171 (or 25169 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 60.

The square root of 117989988 is about 10862.3196417708. The cubic root of 117989988 is about 490.4729405737.

The spelling of 117989988 in words is "one hundred seventeen million, nine hundred eighty-nine thousand, nine hundred eighty-eight".