28857460289 has 24 divisors (see below), whose sum is σ = 33764339880. Its totient is φ = 24591361536.

The previous prime is 28857460223. The next prime is 28857460369. The reversal of 28857460289 is 98206475882.

It can be written as a sum of positive squares in 4 ways, for example, as 10188883600 + 18668576689 = 100940^2 + 136633^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28857460289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28857460789) 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, 6906569 + ... + 6910745.

It is an arithmetic number, because the mean of its divisors is an integer number (1406847495).

Almost surely, 2^28857460289 is an apocalyptic number.

It is an amenable number.

28857460289 is a deficient number, since it is larger than the sum of its proper divisors (4906879591).

28857460289 is a wasteful number, since it uses less digits than its factorization.

28857460289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4977 (or 4970 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 28857460289 in words is "twenty-eight billion, eight hundred fifty-seven million, four hundred sixty thousand, two hundred eighty-nine".