28806577 has 2 divisors, whose sum is σ = 28806578. Its totient is φ = 28806576.

The previous prime is 28806571. The next prime is 28806607. The reversal of 28806577 is 77560882.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 8520561 = 4504^2 + 2919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28806577 is a prime.

It is not a weakly prime, because it can be changed into another prime (28806571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403288 + 14403289.

It is an arithmetic number, because the mean of its divisors is an integer number (14403289).

Almost surely, 2^28806577 is an apocalyptic number.

It is an amenable number.

28806577 is a deficient number, since it is larger than the sum of its proper divisors (1).

28806577 is an equidigital number, since it uses as much as digits as its factorization.

28806577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 28806577 is about 5367.1758868142. The cubic root of 28806577 is about 306.5471045941.

The spelling of 28806577 in words is "twenty-eight million, eight hundred six thousand, five hundred seventy-seven".