118217838 has 32 divisors (see below), whose sum is σ = 249140736. Its totient is φ = 37322208.

The previous prime is 118217837. The next prime is 118217839. The reversal of 118217838 is 838712811.

It is an interprime number because it is at equal distance from previous prime (118217837) and next prime (118217839).

It is a junction number, because it is equal to n+sod(n) for n = 118217796 and 118217805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118217837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10056 + ... + 18372.

It is an arithmetic number, because the mean of its divisors is an integer number (7785648).

Almost surely, 2^118217838 is an apocalyptic number.

118217838 is an abundant number, since it is smaller than the sum of its proper divisors (130922898).

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

118217838 is a wasteful number, since it uses less digits than its factorization.

118217838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8448.

The product of its digits is 21504, while the sum is 39.

The square root of 118217838 is about 10872.8026745637. The cubic root of 118217838 is about 490.7884543513.

The spelling of 118217838 in words is "one hundred eighteen million, two hundred seventeen thousand, eight hundred thirty-eight".