117821800 has 24 divisors (see below), whose sum is σ = 273936150. Its totient is φ = 47128640.

The previous prime is 117821797. The next prime is 117821839. The reversal of 117821800 is 8128711.

It can be written as a sum of positive squares in 3 ways, for example, as 50154724 + 67667076 = 7082^2 + 8226^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 294355 + ... + 294754.

Almost surely, 2^117821800 is an apocalyptic number.

117821800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117821800 is an abundant number, since it is smaller than the sum of its proper divisors (156114350).

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

117821800 is a wasteful number, since it uses less digits than its factorization.

117821800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589125 (or 589116 counting only the distinct ones).

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

The square root of 117821800 is about 10854.5750722909. The cubic root of 117821800 is about 490.2397826843.

The spelling of 117821800 in words is "one hundred seventeen million, eight hundred twenty-one thousand, eight hundred".