117866238 has 64 divisors (see below), whose sum is σ = 280750080. Its totient is φ = 32285952.

The previous prime is 117866233. The next prime is 117866261. The reversal of 117866238 is 832668711.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 117866238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117866233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112923 + ... + 113961.

It is an arithmetic number, because the mean of its divisors is an integer number (4386720).

Almost surely, 2^117866238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117866238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140375040).

117866238 is an abundant number, since it is smaller than the sum of its proper divisors (162883842).

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

117866238 is a wasteful number, since it uses less digits than its factorization.

117866238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its digits is 96768, while the sum is 42.

The square root of 117866238 is about 10856.6218502811. The cubic root of 117866238 is about 490.3014083403.

The spelling of 117866238 in words is "one hundred seventeen million, eight hundred sixty-six thousand, two hundred thirty-eight".