118221440 has 32 divisors (see below), whose sum is σ = 282624660. Its totient is φ = 47288320.

The previous prime is 118221407. The next prime is 118221457. The reversal of 118221440 is 44122811.

It can be written as a sum of positive squares in 2 ways, for example, as 114746944 + 3474496 = 10712^2 + 1864^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91721 + ... + 93000.

Almost surely, 2^118221440 is an apocalyptic number.

118221440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

118221440 is an abundant number, since it is smaller than the sum of its proper divisors (164403220).

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

118221440 is an equidigital number, since it uses as much as digits as its factorization.

118221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184740 (or 184728 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 118221440 is about 10872.9683159660. The cubic root of 118221440 is about 490.7934389405.

It can be divided in two parts, 1182 and 21440, that added together give a palindrome (22622).

The spelling of 118221440 in words is "one hundred eighteen million, two hundred twenty-one thousand, four hundred forty".