108139864 has 48 divisors (see below), whose sum is σ = 239160600. Its totient is φ = 45698688.

The previous prime is 108139847. The next prime is 108139877. The reversal of 108139864 is 468931801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26727 + ... + 30505.

Almost surely, 2^108139864 is an apocalyptic number.

108139864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 108139864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119580300).

108139864 is an abundant number, since it is smaller than the sum of its proper divisors (131020736).

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

108139864 is a wasteful number, since it uses less digits than its factorization.

108139864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872 (or 3861 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 108139864 is about 10399.0318780163. The cubic root of 108139864 is about 476.4258012276.

The spelling of 108139864 in words is "one hundred eight million, one hundred thirty-nine thousand, eight hundred sixty-four".