28028716819101 has 12 divisors (see below), whose sum is σ = 40496448369312. Its totient is φ = 18680953947336.

The previous prime is 28028716819079. The next prime is 28028716819127. The reversal of 28028716819101 is 10191861782082.

28028716819101 is a `hidden beast` number, since 280 + 287 + 1 + 6 + 81 + 9 + 1 + 0 + 1 = 666.

It is not a de Polignac number, because 28028716819101 - 2¹⁵ = 28028716786333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28028716819171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404735571 + ... + 404804816.

It is an arithmetic number, because the mean of its divisors is an integer number (3374704030776).

Almost surely, 2^{28028716819101} is an apocalyptic number.

It is an amenable number.

28028716819101 is a deficient number, since it is larger than the sum of its proper divisors (12467731550211).

28028716819101 is a wasteful number, since it uses less digits than its factorization.

28028716819101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809544240 (or 809544237 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 54.

The spelling of 28028716819101 in words is "twenty-eight trillion, twenty-eight billion, seven hundred sixteen million, eight hundred nineteen thousand, one hundred one".