28711187445 has 32 divisors (see below), whose sum is σ = 46228291200. Its totient is φ = 15215973120.

The previous prime is 28711187441. The next prime is 28711187459. The reversal of 28711187445 is 54478111782.

It is not a de Polignac number, because 28711187445 - 2² = 28711187441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28711187394 and 28711187403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28711187441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4202122 + ... + 4208948.

It is an arithmetic number, because the mean of its divisors is an integer number (1444634100).

Almost surely, 2^28711187445 is an apocalyptic number.

It is an amenable number.

28711187445 is a deficient number, since it is larger than the sum of its proper divisors (17517103755).

28711187445 is a wasteful number, since it uses less digits than its factorization.

28711187445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8565.

The product of its digits is 501760, while the sum is 48.

The spelling of 28711187445 in words is "twenty-eight billion, seven hundred eleven million, one hundred eighty-seven thousand, four hundred forty-five".