28679878227 has 64 divisors (see below), whose sum is σ = 51767976960. Its totient is φ = 13752414720.

The previous prime is 28679878219. The next prime is 28679878243. The reversal of 28679878227 is 72287897682.

It is not a de Polignac number, because 28679878227 - 2³ = 28679878219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28679878217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 323899 + ... + 402827.

It is an arithmetic number, because the mean of its divisors is an integer number (808874640).

Almost surely, 2^28679878227 is an apocalyptic number.

28679878227 is a deficient number, since it is larger than the sum of its proper divisors (23088098733).

28679878227 is a wasteful number, since it uses less digits than its factorization.

28679878227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78985 (or 78963 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 66.

The spelling of 28679878227 in words is "twenty-eight billion, six hundred seventy-nine million, eight hundred seventy-eight thousand, two hundred twenty-seven".