117991544 has 32 divisors (see below), whose sum is σ = 241920000. Its totient is φ = 53505120.

The previous prime is 117991537. The next prime is 117991553. The reversal of 117991544 is 445199711.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 42569 + ... + 45255.

It is an arithmetic number, because the mean of its divisors is an integer number (7560000).

Almost surely, 2^117991544 is an apocalyptic number.

It is an amenable number.

117991544 is an abundant number, since it is smaller than the sum of its proper divisors (123928456).

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

117991544 is a wasteful number, since it uses less digits than its factorization.

117991544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203 (or 3199 counting only the distinct ones).

The product of its digits is 45360, while the sum is 41.

The square root of 117991544 is about 10862.3912652786. The cubic root of 117991544 is about 490.4750966112.

The spelling of 117991544 in words is "one hundred seventeen million, nine hundred ninety-one thousand, five hundred forty-four".