28380773 has 2 divisors, whose sum is σ = 28380774. Its totient is φ = 28380772.

The previous prime is 28380761. The next prime is 28380791. The reversal of 28380773 is 37708382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28376929 + 3844 = 5327^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 28380773 - 2¹⁶ = 28315237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28380713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14190386 + 14190387.

It is an arithmetic number, because the mean of its divisors is an integer number (14190387).

Almost surely, 2^28380773 is an apocalyptic number.

It is an amenable number.

28380773 is a deficient number, since it is larger than the sum of its proper divisors (1).

28380773 is an equidigital number, since it uses as much as digits as its factorization.

28380773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 28380773 is about 5327.3607912361. The cubic root of 28380773 is about 305.0291936582.

The spelling of 28380773 in words is "twenty-eight million, three hundred eighty thousand, seven hundred seventy-three".