1108861785 has 32 divisors (see below), whose sum is σ = 2034908160. Its totient is φ = 572313600.

The previous prime is 1108861781. The next prime is 1108861829. The reversal of 1108861785 is 5871688011.

It is not a de Polignac number, because 1108861785 - 2² = 1108861781 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 1108861785.

It is not an unprimeable number, because it can be changed into a prime (1108861781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128296 + ... + 136665.

It is an arithmetic number, because the mean of its divisors is an integer number (63590880).

Almost surely, 2^1108861785 is an apocalyptic number.

1108861785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1108861785 is a deficient number, since it is larger than the sum of its proper divisors (926046375).

1108861785 is a wasteful number, since it uses less digits than its factorization.

1108861785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265006 (or 265000 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 45.

The square root of 1108861785 is about 33299.5763486564. The cubic root of 1108861785 is about 1035.0447785710.

The spelling of 1108861785 in words is "one billion, one hundred eight million, eight hundred sixty-one thousand, seven hundred eighty-five".