118278978 has 16 divisors (see below), whose sum is σ = 241591680. Its totient is φ = 38587376.

The previous prime is 118278967. The next prime is 118279039. The reversal of 118278978 is 879872811.

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 118278978.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209433 + ... + 209996.

It is an arithmetic number, because the mean of its divisors is an integer number (15099480).

Almost surely, 2^118278978 is an apocalyptic number.

118278978 is an abundant number, since it is smaller than the sum of its proper divisors (123312702).

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

118278978 is a wasteful number, since it uses less digits than its factorization.

118278978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419481.

The product of its digits is 451584, while the sum is 51.

The square root of 118278978 is about 10875.6139137062. The cubic root of 118278978 is about 490.8730485635.

The spelling of 118278978 in words is "one hundred eighteen million, two hundred seventy-eight thousand, nine hundred seventy-eight".