28238825321 has 8 divisors (see below), whose sum is σ = 32276752320. Its totient is φ = 24201850608.

The previous prime is 28238825311. The next prime is 28238825333. The reversal of 28238825321 is 12352883282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28238825321 - 2¹⁰ = 28238824297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28238825311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173351 + ... + 294156.

It is an arithmetic number, because the mean of its divisors is an integer number (4034594040).

Almost surely, 2^28238825321 is an apocalyptic number.

It is an amenable number.

28238825321 is a deficient number, since it is larger than the sum of its proper divisors (4037926999).

28238825321 is an equidigital number, since it uses as much as digits as its factorization.

28238825321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476143.

The product of its digits is 368640, while the sum is 44.

The spelling of 28238825321 in words is "twenty-eight billion, two hundred thirty-eight million, eight hundred twenty-five thousand, three hundred twenty-one".