108381978 has 24 divisors (see below), whose sum is σ = 235550016. Its totient is φ = 36016200.

The previous prime is 108381971. The next prime is 108382007. The reversal of 108381978 is 879183801.

It is not an unprimeable number, because it can be changed into a prime (108381971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3138 + ... + 15053.

It is an arithmetic number, because the mean of its divisors is an integer number (9814584).

Almost surely, 2^108381978 is an apocalyptic number.

108381978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

108381978 is an abundant number, since it is smaller than the sum of its proper divisors (127168038).

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

108381978 is a wasteful number, since it uses less digits than its factorization.

108381978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18530 (or 18527 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 108381978 is about 10410.6665492657. Note that the first 3 decimals coincide. The cubic root of 108381978 is about 476.7810922800.

The spelling of 108381978 in words is "one hundred eight million, three hundred eighty-one thousand, nine hundred seventy-eight".