28320828177 has 4 divisors (see below), whose sum is σ = 37761104240. Its totient is φ = 18880552116.

The previous prime is 28320828167. The next prime is 28320828203. The reversal of 28320828177 is 77182802382.

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.

It is not a de Polignac number, because 28320828177 - 2⁴ = 28320828161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28320828167) 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, 4720138027 + ... + 4720138032.

It is an arithmetic number, because the mean of its divisors is an integer number (9440276060).

Almost surely, 2^28320828177 is an apocalyptic number.

It is an amenable number.

28320828177 is a deficient number, since it is larger than the sum of its proper divisors (9440276063).

28320828177 is an equidigital number, since it uses as much as digits as its factorization.

28320828177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440276062.

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 28320828177 in words is "twenty-eight billion, three hundred twenty million, eight hundred twenty-eight thousand, one hundred seventy-seven".