28075105869 has 32 divisors (see below), whose sum is σ = 39832128000. Its totient is φ = 17539343424.

The previous prime is 28075105867. The next prime is 28075105879. The reversal of 28075105869 is 96850157082.

It is not a de Polignac number, because 28075105869 - 2¹ = 28075105867 is a prime.

It is a super-2 number, since 2×28075105869² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075105867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4504047 + ... + 4510275.

It is an arithmetic number, because the mean of its divisors is an integer number (1244754000).

Almost surely, 2^28075105869 is an apocalyptic number.

It is an amenable number.

28075105869 is a deficient number, since it is larger than the sum of its proper divisors (11757022131).

28075105869 is a wasteful number, since it uses less digits than its factorization.

28075105869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7097.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 28075105869 in words is "twenty-eight billion, seventy-five million, one hundred five thousand, eight hundred sixty-nine".