118643688 has 48 divisors (see below), whose sum is σ = 325742820. Its totient is φ = 39004416.

The previous prime is 118643677. The next prime is 118643689. The reversal of 118643688 is 886346811.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 111894084 + 6749604 = 10578^2 + 2598^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (118643689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6031 + ... + 16542.

Almost surely, 2^118643688 is an apocalyptic number.

118643688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

118643688 is an abundant number, since it is smaller than the sum of its proper divisors (207099132).

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

118643688 is a wasteful number, since it uses less digits than its factorization.

118643688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22658 (or 22651 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 118643688 is about 10892.3683375104. The cubic root of 118643688 is about 491.3770620959.

The spelling of 118643688 in words is "one hundred eighteen million, six hundred forty-three thousand, six hundred eighty-eight".