28823312321 has 2 divisors, whose sum is σ = 28823312322. Its totient is φ = 28823312320.

The previous prime is 28823312311. The next prime is 28823312359. The reversal of 28823312321 is 12321332882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24606628225 + 4216684096 = 156865^2 + 64936^2 .

It is a cyclic number.

It is not a de Polignac number, because 28823312321 - 2¹⁴ = 28823295937 is a prime.

It is not a weakly prime, because it can be changed into another prime (28823312311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14411656160 + 14411656161.

It is an arithmetic number, because the mean of its divisors is an integer number (14411656161).

Almost surely, 2^28823312321 is an apocalyptic number.

It is an amenable number.

28823312321 is a deficient number, since it is larger than the sum of its proper divisors (1).

28823312321 is an equidigital number, since it uses as much as digits as its factorization.

28823312321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The spelling of 28823312321 in words is "twenty-eight billion, eight hundred twenty-three million, three hundred twelve thousand, three hundred twenty-one".