28605775047 has 8 divisors (see below), whose sum is σ = 39371389440. Its totient is φ = 18455338680.

The previous prime is 28605775031. The next prime is 28605775049. The reversal of 28605775047 is 74057750682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28605775047 - 2⁴ = 28605775031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28605775049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153794397 + ... + 153794582.

It is an arithmetic number, because the mean of its divisors is an integer number (4921423680).

Almost surely, 2^28605775047 is an apocalyptic number.

28605775047 is a deficient number, since it is larger than the sum of its proper divisors (10765614393).

28605775047 is a wasteful number, since it uses less digits than its factorization.

28605775047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307589013.

The product of its (nonzero) digits is 3292800, while the sum is 51.

The spelling of 28605775047 in words is "twenty-eight billion, six hundred five million, seven hundred seventy-five thousand, forty-seven".