28914857771688 has 96 divisors (see below), whose sum is σ = 89506222041600. Its totient is φ = 8260663065984.

The previous prime is 28914857771687. The next prime is 28914857771719. The reversal of 28914857771688 is 88617775841982.

28914857771688 is a `hidden beast` number, since 2 + 8 + 9 + 1 + 485 + 7 + 7 + 71 + 68 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (28914857771687) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3245998 + ... + 8268386.

It is an arithmetic number, because the mean of its divisors is an integer number (932356479600).

Almost surely, 2^{28914857771688} is an apocalyptic number.

28914857771688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28914857771688 is an abundant number, since it is smaller than the sum of its proper divisors (60591364269912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28914857771688 is a wasteful number, since it uses less digits than its factorization.

28914857771688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033831 (or 5033824 counting only the distinct ones).

The product of its digits is 3034644480, while the sum is 81.

The spelling of 28914857771688 in words is "twenty-eight trillion, nine hundred fourteen billion, eight hundred fifty-seven million, seven hundred seventy-one thousand, six hundred eighty-eight".