28528697129 has 2 divisors, whose sum is σ = 28528697130. Its totient is φ = 28528697128.

The previous prime is 28528697123. The next prime is 28528697147. The reversal of 28528697129 is 92179682582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27275183104 + 1253514025 = 165152^2 + 35405^2 .

It is a cyclic number.

It is not a de Polignac number, because 28528697129 - 2⁸ = 28528696873 is a prime.

It is not a weakly prime, because it can be changed into another prime (28528697123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14264348564 + 14264348565.

It is an arithmetic number, because the mean of its divisors is an integer number (14264348565).

Almost surely, 2^28528697129 is an apocalyptic number.

It is an amenable number.

28528697129 is a deficient number, since it is larger than the sum of its proper divisors (1).

28528697129 is an equidigital number, since it uses as much as digits as its factorization.

28528697129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 59.

The spelling of 28528697129 in words is "twenty-eight billion, five hundred twenty-eight million, six hundred ninety-seven thousand, one hundred twenty-nine".