28105877909769 has 16 divisors (see below), whose sum is σ = 40905198210240. Its totient is φ = 17023898212160.

The previous prime is 28105877909749. The next prime is 28105877909777. The reversal of 28105877909769 is 96790977850182.

It is a cyclic number.

It is not a de Polignac number, because 28105877909769 - 2²⁴ = 28105861132553 is a prime.

It is a super-2 number, since 2×28105877909769² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (78) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28105877909694 and 28105877909703.

It is not an unprimeable number, because it can be changed into a prime (28105877909749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249122442 + ... + 249235235.

It is an arithmetic number, because the mean of its divisors is an integer number (2556574888140).

Almost surely, 2^{28105877909769} is an apocalyptic number.

It is an amenable number.

28105877909769 is a deficient number, since it is larger than the sum of its proper divisors (12799320300471).

28105877909769 is a wasteful number, since it uses less digits than its factorization.

28105877909769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498359400.

The product of its (nonzero) digits is 960180480, while the sum is 78.

The spelling of 28105877909769 in words is "twenty-eight trillion, one hundred five billion, eight hundred seventy-seven million, nine hundred nine thousand, seven hundred sixty-nine".