28875898161 has 48 divisors (see below), whose sum is σ = 46192768128. Its totient is φ = 17235187200.

The previous prime is 28875898157. The next prime is 28875898171. The reversal of 28875898161 is 16189857882.

It is not a de Polignac number, because 28875898161 - 2² = 28875898157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28875898171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8974425 + ... + 8977641.

It is an arithmetic number, because the mean of its divisors is an integer number (962349336).

Almost surely, 2^28875898161 is an apocalyptic number.

It is an amenable number.

28875898161 is a deficient number, since it is larger than the sum of its proper divisors (17316869967).

28875898161 is a wasteful number, since it uses less digits than its factorization.

28875898161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582 (or 4579 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 63.

The spelling of 28875898161 in words is "twenty-eight billion, eight hundred seventy-five million, eight hundred ninety-eight thousand, one hundred sixty-one".