28509330607 has 4 divisors (see below), whose sum is σ = 29204680176. Its totient is φ = 27813981040.

The previous prime is 28509330559. The next prime is 28509330617. The reversal of 28509330607 is 70603390582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28509330607 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 (28509330617) 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, 347674723 + ... + 347674804.

It is an arithmetic number, because the mean of its divisors is an integer number (7301170044).

Almost surely, 2^28509330607 is an apocalyptic number.

28509330607 is a deficient number, since it is larger than the sum of its proper divisors (695349569).

28509330607 is an equidigital number, since it uses as much as digits as its factorization.

28509330607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695349568.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 28509330607 in words is "twenty-eight billion, five hundred nine million, three hundred thirty thousand, six hundred seven".