108639930 has 128 divisors (see below), whose sum is σ = 312035328. Its totient is φ = 23692032.

The previous prime is 108639907. The next prime is 108639941. The reversal of 108639930 is 39936801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 478477 + ... + 478703.

It is an arithmetic number, because the mean of its divisors is an integer number (2437776).

Almost surely, 2^108639930 is an apocalyptic number.

108639930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 108639930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156017664).

108639930 is an abundant number, since it is smaller than the sum of its proper divisors (203395398).

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

108639930 is a wasteful number, since it uses less digits than its factorization.

108639930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 108639930 is about 10423.0480186940. The cubic root of 108639930 is about 477.1590431684.

The spelling of 108639930 in words is "one hundred eight million, six hundred thirty-nine thousand, nine hundred thirty".