28630608397 has 2 divisors, whose sum is σ = 28630608398. Its totient is φ = 28630608396.

The previous prime is 28630608379. The next prime is 28630608421. The reversal of 28630608397 is 79380603682.

Together with previous prime (28630608379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18690717796 + 9939890601 = 136714^2 + 99699^2 .

It is a cyclic number.

It is not a de Polignac number, because 28630608397 - 2²³ = 28622219789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28630608697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315304198 + 14315304199.

It is an arithmetic number, because the mean of its divisors is an integer number (14315304199).

Almost surely, 2^28630608397 is an apocalyptic number.

It is an amenable number.

28630608397 is a deficient number, since it is larger than the sum of its proper divisors (1).

28630608397 is an equidigital number, since it uses as much as digits as its factorization.

28630608397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 28630608397 in words is "twenty-eight billion, six hundred thirty million, six hundred eight thousand, three hundred ninety-seven".