1806855768 has 128 divisors (see below), whose sum is σ = 5351040000. Its totient is φ = 563262336.

The previous prime is 1806855703. The next prime is 1806855779. The reversal of 1806855768 is 8675586081.

1806855768 is a `hidden beast` number, since 1 + 8 + 0 + 68 + 5 + 576 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321430 + ... + 327002.

It is an arithmetic number, because the mean of its divisors is an integer number (41805000).

Almost surely, 2^1806855768 is an apocalyptic number.

1806855768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806855768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2675520000).

1806855768 is an abundant number, since it is smaller than the sum of its proper divisors (3544184232).

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

1806855768 is a wasteful number, since it uses less digits than its factorization.

1806855768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5686 (or 5676 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The square root of 1806855768 is about 42507.1260849284. The cubic root of 1806855768 is about 1217.9828190447.

The spelling of 1806855768 in words is "one billion, eight hundred six million, eight hundred fifty-five thousand, seven hundred sixty-eight".