28655771287 has 16 divisors (see below), whose sum is σ = 33697429920. Its totient is φ = 24024009600.

The previous prime is 28655771281. The next prime is 28655771297. The reversal of 28655771287 is 78217755682.

It is a cyclic number.

It is not a de Polignac number, because 28655771287 - 2²³ = 28647382679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28655771281) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 57289 + ... + 246157.

It is an arithmetic number, because the mean of its divisors is an integer number (2106089370).

Almost surely, 2^28655771287 is an apocalyptic number.

28655771287 is a deficient number, since it is larger than the sum of its proper divisors (5041658633).

28655771287 is a wasteful number, since it uses less digits than its factorization.

28655771287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189954.

The product of its digits is 13171200, while the sum is 58.

The spelling of 28655771287 in words is "twenty-eight billion, six hundred fifty-five million, seven hundred seventy-one thousand, two hundred eighty-seven".