118639866 has 8 divisors (see below), whose sum is σ = 237279744. Its totient is φ = 39546620.

The previous prime is 118639861. The next prime is 118639879. The reversal of 118639866 is 668936811.

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

118639866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (118639861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9886650 + ... + 9886661.

It is an arithmetic number, because the mean of its divisors is an integer number (29659968).

Almost surely, 2^118639866 is an apocalyptic number.

118639866 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.

118639866 is a wasteful number, since it uses less digits than its factorization.

118639866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19773316.

The product of its digits is 373248, while the sum is 48.

The square root of 118639866 is about 10892.1928921590. The cubic root of 118639866 is about 491.3717856154.

The spelling of 118639866 in words is "one hundred eighteen million, six hundred thirty-nine thousand, eight hundred sixty-six".