117781880 has 16 divisors (see below), whose sum is σ = 265009320. Its totient is φ = 47112736.

The previous prime is 117781861. The next prime is 117781891. The reversal of 117781880 is 88187711.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1472234 + ... + 1472313.

Almost surely, 2^117781880 is an apocalyptic number.

117781880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117781880 is an abundant number, since it is smaller than the sum of its proper divisors (147227440).

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

117781880 is a wasteful number, since it uses less digits than its factorization.

117781880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944558 (or 2944554 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 41.

The square root of 117781880 is about 10852.7360605517. The cubic root of 117781880 is about 490.1844092791.

The spelling of 117781880 in words is "one hundred seventeen million, seven hundred eighty-one thousand, eight hundred eighty".