118221408 has 36 divisors (see below), whose sum is σ = 336192948. Its totient is φ = 39407040.

The previous prime is 118221407. The next prime is 118221457. The reversal of 118221408 is 804122811.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118221407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204958 + ... + 205533.

It is an arithmetic number, because the mean of its divisors is an integer number (9338693).

Almost surely, 2^118221408 is an apocalyptic number.

118221408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

118221408 is an abundant number, since it is smaller than the sum of its proper divisors (217971540).

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

118221408 is a wasteful number, since it uses less digits than its factorization.

118221408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410507 (or 410496 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 118221408 is about 10872.9668444266. The cubic root of 118221408 is about 490.7933946581.

The spelling of 118221408 in words is "one hundred eighteen million, two hundred twenty-one thousand, four hundred eight".