108138408 has 32 divisors (see below), whose sum is σ = 308967360. Its totient is φ = 30896640.

The previous prime is 108138403. The next prime is 108138409. The reversal of 108138408 is 804831801.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (108138403) 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 7 ways as a sum of consecutive naturals, for example, 321673 + ... + 322008.

It is an arithmetic number, because the mean of its divisors is an integer number (9655230).

Almost surely, 2^108138408 is an apocalyptic number.

It is an amenable number.

108138408 is an abundant number, since it is smaller than the sum of its proper divisors (200828952).

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

108138408 is a wasteful number, since it uses less digits than its factorization.

108138408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643697 (or 643693 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 108138408 is about 10398.9618712639. The cubic root of 108138408 is about 476.4236630119.

The spelling of 108138408 in words is "one hundred eight million, one hundred thirty-eight thousand, four hundred eight".