28128526607 has 4 divisors (see below), whose sum is σ = 28589650056. Its totient is φ = 27667403160.

The previous prime is 28128526589. The next prime is 28128526627. The reversal of 28128526607 is 70662582182.

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 28128526607 - 2¹² = 28128522511 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 (28128526627) 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, 230561633 + ... + 230561754.

It is an arithmetic number, because the mean of its divisors is an integer number (7147412514).

Almost surely, 2^28128526607 is an apocalyptic number.

28128526607 is a deficient number, since it is larger than the sum of its proper divisors (461123449).

28128526607 is an equidigital number, since it uses as much as digits as its factorization.

28128526607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461123448.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 28128526607 in words is "twenty-eight billion, one hundred twenty-eight million, five hundred twenty-six thousand, six hundred seven".