1808872818 has 8 divisors (see below), whose sum is σ = 3617745648. Its totient is φ = 602957604.

The previous prime is 1808872801. The next prime is 1808872829. The reversal of 1808872818 is 8182788081.

It is a sphenic number, since it is the product of 3 distinct primes.

1808872818 is an admirable number.

It is a super-2 number, since 2×1808872818² = 6544041743398522248, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 150739396 + ... + 150739407.

It is an arithmetic number, because the mean of its divisors is an integer number (452218206).

Almost surely, 2^1808872818 is an apocalyptic number.

1808872818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1808872818 is a wasteful number, since it uses less digits than its factorization.

1808872818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301478808.

The product of its (nonzero) digits is 458752, while the sum is 51.

The square root of 1808872818 is about 42530.8454888919. The cubic root of 1808872818 is about 1218.4358746933.

The spelling of 1808872818 in words is "one billion, eight hundred eight million, eight hundred seventy-two thousand, eight hundred eighteen".