118639878 has 24 divisors (see below), whose sum is σ = 276019992. Its totient is φ = 33897024.

The previous prime is 118639861. The next prime is 118639879. The reversal of 118639878 is 878936811.

It is a self number, because there is not a number n which added to its sum of digits gives 118639878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118639879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201475 + ... + 202062.

It is an arithmetic number, because the mean of its divisors is an integer number (11500833).

Almost surely, 2^118639878 is an apocalyptic number.

118639878 is an abundant number, since it is smaller than the sum of its proper divisors (157380114).

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

118639878 is a wasteful number, since it uses less digits than its factorization.

118639878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403556 (or 403549 counting only the distinct ones).

The product of its digits is 580608, while the sum is 51.

The square root of 118639878 is about 10892.1934430123. The cubic root of 118639878 is about 491.3718021823.

The spelling of 118639878 in words is "one hundred eighteen million, six hundred thirty-nine thousand, eight hundred seventy-eight".