28849398867 has 24 divisors (see below), whose sum is σ = 42105929216. Its totient is φ = 19033128576.

The previous prime is 28849398833. The next prime is 28849398869. The reversal of 28849398867 is 76889394882.

It is not a de Polignac number, because 28849398867 - 2²⁴ = 28832621651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28849398795 and 28849398804.

It is not an unprimeable number, because it can be changed into a prime (28849398869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421983 + ... + 485559.

Almost surely, 2^28849398867 is an apocalyptic number.

28849398867 is a deficient number, since it is larger than the sum of its proper divisors (13256530349).

28849398867 is a wasteful number, since it uses less digits than its factorization.

28849398867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64107 (or 64104 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 72.

It can be divided in two parts, 28849 and 398867, that added together give a square (427716 = 654²).

The spelling of 28849398867 in words is "twenty-eight billion, eight hundred forty-nine million, three hundred ninety-eight thousand, eight hundred sixty-seven".