28500581747 has 4 divisors (see below), whose sum is σ = 31091543736. Its totient is φ = 25909619760.

The previous prime is 28500581729. The next prime is 28500581771. The reversal of 28500581747 is 74718500582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28500581747 - 2¹⁰ = 28500580723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28500581147) 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, 1295480978 + ... + 1295480999.

It is an arithmetic number, because the mean of its divisors is an integer number (7772885934).

Almost surely, 2^28500581747 is an apocalyptic number.

28500581747 is a deficient number, since it is larger than the sum of its proper divisors (2590961989).

28500581747 is a wasteful number, since it uses less digits than its factorization.

28500581747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590961988.

The product of its (nonzero) digits is 627200, while the sum is 47.

The spelling of 28500581747 in words is "twenty-eight billion, five hundred million, five hundred eighty-one thousand, seven hundred forty-seven".