1928288854889 has 4 divisors (see below), whose sum is σ = 1980404769924. Its totient is φ = 1876172939856.

The previous prime is 1928288854861. The next prime is 1928288854913. The reversal of 1928288854889 is 9884588828291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1161508419289 + 766780435600 = 1077733^2 + 875660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1928288854889 - 2¹⁶ = 1928288789353 is a prime.

It is a super-3 number, since 3×1928288854889³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1928288854829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26057957462 + ... + 26057957535.

It is an arithmetic number, because the mean of its divisors is an integer number (495101192481).

Almost surely, 2^{1928288854889} is an apocalyptic number.

It is an amenable number.

1928288854889 is a deficient number, since it is larger than the sum of its proper divisors (52115915035).

1928288854889 is an equidigital number, since it uses as much as digits as its factorization.

1928288854889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52115915034.

The product of its digits is 1698693120, while the sum is 80.

The spelling of 1928288854889 in words is "one trillion, nine hundred twenty-eight billion, two hundred eighty-eight million, eight hundred fifty-four thousand, eight hundred eighty-nine".