118939905 has 144 divisors (see below), whose sum is σ = 268894080. Its totient is φ = 48190464.

The previous prime is 118939889. The next prime is 118939907. The reversal of 118939905 is 509939811.

It is not a de Polignac number, because 118939905 - 2⁴ = 118939889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (118939907) 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 in 143 ways as a sum of consecutive naturals, for example, 712132 + ... + 712298.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^118939905 is an apocalyptic number.

118939905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

118939905 is an abundant number, since it is smaller than the sum of its proper divisors (149954175).

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

118939905 is a wasteful number, since it uses less digits than its factorization.

118939905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 118939905 is about 10905.9573169896. The cubic root of 118939905 is about 491.7856616446.

The spelling of 118939905 in words is "one hundred eighteen million, nine hundred thirty-nine thousand, nine hundred five".