28858574444321 has 2 divisors, whose sum is σ = 28858574444322. Its totient is φ = 28858574444320.

The previous prime is 28858574444303. The next prime is 28858574444327. The reversal of 28858574444321 is 12344447585882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19553243829025 + 9305330615296 = 4421905^2 + 3050464^2 .

It is a cyclic number.

It is not a de Polignac number, because 28858574444321 - 2¹⁸ = 28858574182177 is a prime.

It is a super-2 number, since 2×28858574444321² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28858574444327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14429287222160 + 14429287222161.

It is an arithmetic number, because the mean of its divisors is an integer number (14429287222161).

Almost surely, 2^{28858574444321} is an apocalyptic number.

It is an amenable number.

28858574444321 is a deficient number, since it is larger than the sum of its proper divisors (1).

28858574444321 is an equidigital number, since it uses as much as digits as its factorization.

28858574444321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 275251200, while the sum is 65.

The spelling of 28858574444321 in words is "twenty-eight trillion, eight hundred fifty-eight billion, five hundred seventy-four million, four hundred forty-four thousand, three hundred twenty-one".