28626428297 has 2 divisors, whose sum is σ = 28626428298. Its totient is φ = 28626428296.

The previous prime is 28626428279. The next prime is 28626428309. The reversal of 28626428297 is 79282462682.

It is a happy number.

Together with previous prime (28626428279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15590269321 + 13036158976 = 124861^2 + 114176^2 .

It is a cyclic number.

It is not a de Polignac number, because 28626428297 - 2¹² = 28626424201 is a prime.

It is not a weakly prime, because it can be changed into another prime (28626448297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14313214148 + 14313214149.

It is an arithmetic number, because the mean of its divisors is an integer number (14313214149).

Almost surely, 2^28626428297 is an apocalyptic number.

It is an amenable number.

28626428297 is a deficient number, since it is larger than the sum of its proper divisors (1).

28626428297 is an equidigital number, since it uses as much as digits as its factorization.

28626428297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9289728, while the sum is 56.

The spelling of 28626428297 in words is "twenty-eight billion, six hundred twenty-six million, four hundred twenty-eight thousand, two hundred ninety-seven".