28747187589 has 4 divisors (see below), whose sum is σ = 38329583456. Its totient is φ = 19164791724.

The previous prime is 28747187563. The next prime is 28747187591. The reversal of 28747187589 is 98578174782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28747187589 - 2⁷ = 28747187461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28747182589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4791197929 + ... + 4791197934.

It is an arithmetic number, because the mean of its divisors is an integer number (9582395864).

Almost surely, 2^28747187589 is an apocalyptic number.

It is an amenable number.

28747187589 is a deficient number, since it is larger than the sum of its proper divisors (9582395867).

28747187589 is an equidigital number, since it uses as much as digits as its factorization.

28747187589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9582395866.

The product of its digits is 63221760, while the sum is 66.

The spelling of 28747187589 in words is "twenty-eight billion, seven hundred forty-seven million, one hundred eighty-seven thousand, five hundred eighty-nine".