118278218 has 4 divisors (see below), whose sum is σ = 177417330. Its totient is φ = 59139108.

The previous prime is 118278217. The next prime is 118278257. The reversal of 118278218 is 812872811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812872811 = 733 ⋅1108967.

It can be written as a sum of positive squares in only one way, i.e., 68674369 + 49603849 = 8287^2 + 7043^2 .

It is not an unprimeable number, because it can be changed into a prime (118278217) 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 as a sum of consecutive naturals, namely, 29569553 + ... + 29569556.

Almost surely, 2^118278218 is an apocalyptic number.

118278218 is a deficient number, since it is larger than the sum of its proper divisors (59139112).

118278218 is an equidigital number, since it uses as much as digits as its factorization.

118278218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59139111.

The product of its digits is 14336, while the sum is 38.

The square root of 118278218 is about 10875.5789730938. The cubic root of 118278218 is about 490.8719971951.

The spelling of 118278218 in words is "one hundred eighteen million, two hundred seventy-eight thousand, two hundred eighteen".