117810820 has 12 divisors (see below), whose sum is σ = 247402764. Its totient is φ = 47124320.

The previous prime is 117810817. The next prime is 117810827. The reversal of 117810820 is 28018711.

It can be written as a sum of positive squares in 2 ways, for example, as 18130564 + 99680256 = 4258^2 + 9984^2 .

It is not an unprimeable number, because it can be changed into a prime (117810827) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2945251 + ... + 2945290.

It is an arithmetic number, because the mean of its divisors is an integer number (20616897).

Almost surely, 2^117810820 is an apocalyptic number.

117810820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117810820 is an abundant number, since it is smaller than the sum of its proper divisors (129591944).

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

117810820 is a wasteful number, since it uses less digits than its factorization.

117810820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5890550 (or 5890548 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 117810820 is about 10854.0692829924. The cubic root of 117810820 is about 490.2245534708.

The spelling of 117810820 in words is "one hundred seventeen million, eight hundred ten thousand, eight hundred twenty".