28019512982773 has 4 divisors (see below), whose sum is σ = 30174860135308. Its totient is φ = 25864165830240.

The previous prime is 28019512982749. The next prime is 28019512982777. The reversal of 28019512982773 is 37728921591082.

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 1755712451089 + 26263800531684 = 1325033^2 + 5124822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28019512982773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28019512982777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077673576248 + ... + 1077673576273.

It is an arithmetic number, because the mean of its divisors is an integer number (7543715033827).

Almost surely, 2^{28019512982773} is an apocalyptic number.

It is an amenable number.

28019512982773 is a deficient number, since it is larger than the sum of its proper divisors (2155347152535).

28019512982773 is a wasteful number, since it uses less digits than its factorization.

28019512982773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155347152534.

The product of its (nonzero) digits is 30481920, while the sum is 64.

The spelling of 28019512982773 in words is "twenty-eight trillion, nineteen billion, five hundred twelve million, nine hundred eighty-two thousand, seven hundred seventy-three".