28719073 has 2 divisors, whose sum is σ = 28719074. Its totient is φ = 28719072.

The previous prime is 28719059. The next prime is 28719101. The reversal of 28719073 is 37091782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24830289 + 3888784 = 4983^2 + 1972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28719073 is a prime.

It is not a weakly prime, because it can be changed into another prime (28719373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14359536 + 14359537.

It is an arithmetic number, because the mean of its divisors is an integer number (14359537).

Almost surely, 2^28719073 is an apocalyptic number.

It is an amenable number.

28719073 is a deficient number, since it is larger than the sum of its proper divisors (1).

28719073 is an equidigital number, since it uses as much as digits as its factorization.

28719073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 28719073 is about 5359.0179137599. The cubic root of 28719073 is about 306.2363965636.

The spelling of 28719073 in words is "twenty-eight million, seven hundred nineteen thousand, seventy-three".