1811728268 has 12 divisors (see below), whose sum is σ = 3623456592. Its totient is φ = 776454960.

The previous prime is 1811728241. The next prime is 1811728271. The reversal of 1811728268 is 8628271181.

1811728268 is an admirable number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32352263 + ... + 32352318.

It is an arithmetic number, because the mean of its divisors is an integer number (301954716).

Almost surely, 2^1811728268 is an apocalyptic number.

It is an amenable number.

1811728268 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.

1811728268 is a wasteful number, since it uses less digits than its factorization.

1811728268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64704592 (or 64704590 counting only the distinct ones).

The product of its digits is 86016, while the sum is 44.

The square root of 1811728268 is about 42564.4014171467. The cubic root of 1811728268 is about 1219.0766703618.

The spelling of 1811728268 in words is "one billion, eight hundred eleven million, seven hundred twenty-eight thousand, two hundred sixty-eight".