28320625147 has 4 divisors (see below), whose sum is σ = 28339221960. Its totient is φ = 28302028336.

The previous prime is 28320625139. The next prime is 28320625163. The reversal of 28320625147 is 74152602382.

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 28320625147 - 2³ = 28320625139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28320625187) 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, 9296122 + ... + 9299167.

It is an arithmetic number, because the mean of its divisors is an integer number (7084805490).

Almost surely, 2^28320625147 is an apocalyptic number.

28320625147 is a deficient number, since it is larger than the sum of its proper divisors (18596813).

28320625147 is a wasteful number, since it uses less digits than its factorization.

28320625147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18596812.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 28320625147 in words is "twenty-eight billion, three hundred twenty million, six hundred twenty-five thousand, one hundred forty-seven".