108139866 has 16 divisors (see below), whose sum is σ = 216648000. Its totient is φ = 35985248.

The previous prime is 108139847. The next prime is 108139877. The reversal of 108139866 is 668931801.

It is a Curzon number.

It is an unprimeable number.

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, 11451 + ... + 18638.

It is an arithmetic number, because the mean of its divisors is an integer number (13540500).

Almost surely, 2^108139866 is an apocalyptic number.

108139866 is an abundant number, since it is smaller than the sum of its proper divisors (108508134).

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

108139866 is a wasteful number, since it uses less digits than its factorization.

108139866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30693.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 108139866 is about 10399.0319741791. The cubic root of 108139866 is about 476.4258041647.

The spelling of 108139866 in words is "one hundred eight million, one hundred thirty-nine thousand, eight hundred sixty-six".