118908405 has 192 divisors, whose sum is σ = 281788416. Its totient is φ = 46656000.

The previous prime is 118908389. The next prime is 118908409. The reversal of 118908405 is 504809811.

It is not a de Polignac number, because 118908405 - 2⁴ = 118908389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118908405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118908409) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2900185 + ... + 2900225.

It is an arithmetic number, because the mean of its divisors is an integer number (1467648).

Almost surely, 2^118908405 is an apocalyptic number.

118908405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

118908405 is an abundant number, since it is smaller than the sum of its proper divisors (162880011).

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

118908405 is a wasteful number, since it uses less digits than its factorization.

118908405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 118908405 is about 10904.5130565285. The cubic root of 118908405 is about 491.7422430344.

The spelling of 118908405 in words is "one hundred eighteen million, nine hundred eight thousand, four hundred five".