108193890 has 64 divisors (see below), whose sum is σ = 297686016. Its totient is φ = 24652992.

The previous prime is 108193889. The next prime is 108193901. The reversal of 108193890 is 98391801.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 31 ways as a sum of consecutive naturals, for example, 92449 + ... + 93611.

It is an arithmetic number, because the mean of its divisors is an integer number (4651344).

Almost surely, 2^108193890 is an apocalyptic number.

108193890 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 108193890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148843008).

108193890 is an abundant number, since it is smaller than the sum of its proper divisors (189492126).

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

108193890 is a wasteful number, since it uses less digits than its factorization.

108193890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 108193890 is about 10401.6291993130. The cubic root of 108193890 is about 476.5051278027.

Subtracting from 108193890 its reverse (98391801), we obtain a palindrome (9802089).

The spelling of 108193890 in words is "one hundred eight million, one hundred ninety-three thousand, eight hundred ninety".