1108805985 has 96 divisors (see below), whose sum is σ = 2281144320. Its totient is φ = 487555200.

The previous prime is 1108805963. The next prime is 1108805987. The reversal of 1108805985 is 5895088011.

It is not a de Polignac number, because 1108805985 - 2⁶ = 1108805921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1108805985.

It is not an unprimeable number, because it can be changed into a prime (1108805987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2646106 + ... + 2646524.

It is an arithmetic number, because the mean of its divisors is an integer number (23761920).

Almost surely, 2^1108805985 is an apocalyptic number.

1108805985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1108805985 is an abundant number, since it is smaller than the sum of its proper divisors (1172338335).

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

1108805985 is a wasteful number, since it uses less digits than its factorization.

1108805985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The square root of 1108805985 is about 33298.7384896185. The cubic root of 1108805985 is about 1035.0274164830.

The spelling of 1108805985 in words is "one billion, one hundred eight million, eight hundred five thousand, nine hundred eighty-five".