28740773 has 2 divisors, whose sum is σ = 28740774. Its totient is φ = 28740772.

The previous prime is 28740743. The next prime is 28740779. The reversal of 28740773 is 37704782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26234884 + 2505889 = 5122^2 + 1583^2 .

It is a cyclic number.

It is not a de Polignac number, because 28740773 - 2⁶ = 28740709 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28740779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14370386 + 14370387.

It is an arithmetic number, because the mean of its divisors is an integer number (14370387).

Almost surely, 2^28740773 is an apocalyptic number.

It is an amenable number.

28740773 is a deficient number, since it is larger than the sum of its proper divisors (1).

28740773 is an equidigital number, since it uses as much as digits as its factorization.

28740773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 28740773 is about 5361.0421561484. The cubic root of 28740773 is about 306.3135074181.

The spelling of 28740773 in words is "twenty-eight million, seven hundred forty thousand, seven hundred seventy-three".