28300228221 has 8 divisors (see below), whose sum is σ = 38753465824. Its totient is φ = 18356904720.

The previous prime is 28300228211. The next prime is 28300228241. The reversal of 28300228221 is 12282200382.

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

It is not a de Polignac number, because 28300228221 - 2⁷ = 28300228093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28300228211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127478395 + ... + 127478616.

It is an arithmetic number, because the mean of its divisors is an integer number (4844183228).

Almost surely, 2^28300228221 is an apocalyptic number.

It is an amenable number.

28300228221 is a deficient number, since it is larger than the sum of its proper divisors (10453237603).

28300228221 is a wasteful number, since it uses less digits than its factorization.

28300228221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254957051.

The product of its (nonzero) digits is 6144, while the sum is 30.

The spelling of 28300228221 in words is "twenty-eight billion, three hundred million, two hundred twenty-eight thousand, two hundred twenty-one".