28269337639 has 2 divisors, whose sum is σ = 28269337640. Its totient is φ = 28269337638.

The previous prime is 28269337609. The next prime is 28269337693. The reversal of 28269337639 is 93673396282.

Together with next prime (28269337693) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28269337639 - 2¹⁹ = 28268813351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28269337609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14134668819 + 14134668820.

It is an arithmetic number, because the mean of its divisors is an integer number (14134668820).

Almost surely, 2^28269337639 is an apocalyptic number.

28269337639 is a deficient number, since it is larger than the sum of its proper divisors (1).

28269337639 is an equidigital number, since it uses as much as digits as its factorization.

28269337639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 58.

The spelling of 28269337639 in words is "twenty-eight billion, two hundred sixty-nine million, three hundred thirty-seven thousand, six hundred thirty-nine".