118 has 4 divisors (see below), whose sum is σ = 180. Its totient is φ = 58.

The previous prime is 113. The next prime is 127. The reversal of 118 is 811.

Adding to 118 its sum of digits (10), we get a 7-th power (128 = 2^{7}).

Adding to 118 its reverse (811), we get a palindrome (929).

It can be divided in two parts, 11 and 8, that multiplied together give a palindrome (88).

118 is nontrivially palindromic in base 9.

118 is an esthetic number in base 12 and base 16, because in such bases its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a magnanimous number.

118 is an undulating number in base 9.

It is a plaindrome in base 7, base 8, base 10, base 12 and base 15.

It is a nialpdrome in base 5, base 11, base 13, base 14 and base 16.

It is a congruent number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28 + ... + 31.

It is an arithmetic number, because the mean of its divisors is an integer number (45).

118 is a deficient number, since it is larger than the sum of its proper divisors (62).

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

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

The sum of its prime factors is 61.

The product of its digits is 8, while the sum is 10.

The square root of 118 is about 10.8627804912. The cubic root of 118 is about 4.9048681315.

The spelling of 118 in words is "one hundred eighteen", and thus it is an aban number.

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