28027561311908 has 24 divisors (see below), whose sum is σ = 51068211492984. Its totient is φ = 13447850284800.

The previous prime is 28027561311881. The next prime is 28027561311913. The reversal of 28027561311908 is 80911316572082.

It can be written as a sum of positive squares in 4 ways, for example, as 27779555584 + 27999781756324 = 166672^2 + 5291482^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28027561311908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1400807735 + ... + 1400827742.

It is an arithmetic number, because the mean of its divisors is an integer number (2127842145541).

Almost surely, 2^{28027561311908} is an apocalyptic number.

It is an amenable number.

28027561311908 is a deficient number, since it is larger than the sum of its proper divisors (23040650181076).

28027561311908 is a wasteful number, since it uses less digits than its factorization.

28027561311908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801635583 (or 2801635581 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 28027561311908 in words is "twenty-eight trillion, twenty-seven billion, five hundred sixty-one million, three hundred eleven thousand, nine hundred eight".