28328895547 has 4 divisors (see below), whose sum is σ = 28333080016. Its totient is φ = 28324711080.

The previous prime is 28328895521. The next prime is 28328895577. The reversal of 28328895547 is 74559882382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74559882382 = 2 ⋅37279941191.

It is a cyclic number.

It is not a de Polignac number, because 28328895547 - 2¹⁹ = 28328371259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28328895577) 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, 2082063 + ... + 2095624.

It is an arithmetic number, because the mean of its divisors is an integer number (7083270004).

Almost surely, 2^28328895547 is an apocalyptic number.

28328895547 is a deficient number, since it is larger than the sum of its proper divisors (4184469).

28328895547 is an equidigital number, since it uses as much as digits as its factorization.

28328895547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184468.

The product of its digits is 38707200, while the sum is 61.

The spelling of 28328895547 in words is "twenty-eight billion, three hundred twenty-eight million, eight hundred ninety-five thousand, five hundred forty-seven".