28768073 has 2 divisors, whose sum is σ = 28768074. Its totient is φ = 28768072.

The previous prime is 28768039. The next prime is 28768081. The reversal of 28768073 is 37086782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28440889 + 327184 = 5333^2 + 572^2 .

It is a cyclic number.

It is not a de Polignac number, because 28768073 - 2¹⁴ = 28751689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28768073.

It is not a weakly prime, because it can be changed into another prime (28768013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14384036 + 14384037.

It is an arithmetic number, because the mean of its divisors is an integer number (14384037).

Almost surely, 2^28768073 is an apocalyptic number.

It is an amenable number.

28768073 is a deficient number, since it is larger than the sum of its proper divisors (1).

28768073 is an equidigital number, since it uses as much as digits as its factorization.

28768073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28768073 is about 5363.5876985466. The cubic root of 28768073 is about 306.4104627370.

The spelling of 28768073 in words is "twenty-eight million, seven hundred sixty-eight thousand, seventy-three".