28047309601 has 4 divisors (see below), whose sum is σ = 28090660032. Its totient is φ = 28003959172.

The previous prime is 28047309599. The next prime is 28047309607. The reversal of 28047309601 is 10690374082.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10690374082 = 2 ⋅5345187041.

It is a cyclic number.

It is not a de Polignac number, because 28047309601 - 2¹ = 28047309599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28047309607) 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, 21674245 + ... + 21675538.

It is an arithmetic number, because the mean of its divisors is an integer number (7022665008).

Almost surely, 2^28047309601 is an apocalyptic number.

It is an amenable number.

28047309601 is a deficient number, since it is larger than the sum of its proper divisors (43350431).

28047309601 is an equidigital number, since it uses as much as digits as its factorization.

28047309601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43350430.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 28047309601 in words is "twenty-eight billion, forty-seven million, three hundred nine thousand, six hundred one".