117821238 has 8 divisors (see below), whose sum is σ = 235642488. Its totient is φ = 39273744.

The previous prime is 117821227. The next prime is 117821251. The reversal of 117821238 is 832128711.

It is a sphenic number, since it is the product of 3 distinct primes.

117821238 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 117821199 and 117821208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9818431 + ... + 9818442.

It is an arithmetic number, because the mean of its divisors is an integer number (29455311).

Almost surely, 2^117821238 is an apocalyptic number.

117821238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

117821238 is a wasteful number, since it uses less digits than its factorization.

117821238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19636878.

The product of its digits is 5376, while the sum is 33.

The square root of 117821238 is about 10854.5491845585. The cubic root of 117821238 is about 490.2390032156.

Adding to 117821238 its reverse (832128711), we get a palindrome (949949949).

The spelling of 117821238 in words is "one hundred seventeen million, eight hundred twenty-one thousand, two hundred thirty-eight".