28500912329 has 4 divisors (see below), whose sum is σ = 28501909776. Its totient is φ = 28499914884.

The previous prime is 28500912269. The next prime is 28500912347. The reversal of 28500912329 is 92321900582.

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 a cyclic number.

It is not a de Polignac number, because 28500912329 - 2⁸ = 28500912073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28500915329) 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, 454559 + ... + 513444.

It is an arithmetic number, because the mean of its divisors is an integer number (7125477444).

Almost surely, 2^28500912329 is an apocalyptic number.

It is an amenable number.

28500912329 is a deficient number, since it is larger than the sum of its proper divisors (997447).

28500912329 is an equidigital number, since it uses as much as digits as its factorization.

28500912329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997446.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 28500912329 in words is "twenty-eight billion, five hundred million, nine hundred twelve thousand, three hundred twenty-nine".