109785812 has 12 divisors (see below), whose sum is σ = 192293556. Its totient is φ = 54844800.

The previous prime is 109785803. The next prime is 109785829. The reversal of 109785812 is 218587901.

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 103958416 = 2414^2 + 10196^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 109785812.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 6623 + ... + 16230.

It is an arithmetic number, because the mean of its divisors is an integer number (16024463).

Almost surely, 2^109785812 is an apocalyptic number.

It is an amenable number.

109785812 is a deficient number, since it is larger than the sum of its proper divisors (82507744).

109785812 is a wasteful number, since it uses less digits than its factorization.

109785812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24058 (or 24056 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 109785812 is about 10477.8724939751. The cubic root of 109785812 is about 478.8307943549.

The spelling of 109785812 in words is "one hundred nine million, seven hundred eighty-five thousand, eight hundred twelve".