28808077 has 2 divisors, whose sum is σ = 28808078. Its totient is φ = 28808076.

The previous prime is 28808071. The next prime is 28808093. The reversal of 28808077 is 77080882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23290276 + 5517801 = 4826^2 + 2349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28808077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28808071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14404038 + 14404039.

It is an arithmetic number, because the mean of its divisors is an integer number (14404039).

Almost surely, 2^28808077 is an apocalyptic number.

It is an amenable number.

28808077 is a deficient number, since it is larger than the sum of its proper divisors (1).

28808077 is an equidigital number, since it uses as much as digits as its factorization.

28808077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 28808077 is about 5367.3156232888. The cubic root of 28808077 is about 306.5524252850.

The spelling of 28808077 in words is "twenty-eight million, eight hundred eight thousand, seventy-seven".