7728280361 has 2 divisors, whose sum is σ = 7728280362. Its totient is φ = 7728280360.

The previous prime is 7728280309. The next prime is 7728280411. The reversal of 7728280361 is 1630828277.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5772960400 + 1955319961 = 75980^2 + 44219^2 .

It is a cyclic number.

It is not a de Polignac number, because 7728280361 - 2¹⁰ = 7728279337 is a prime.

It is not a weakly prime, because it can be changed into another prime (7728280061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3864140180 + 3864140181.

It is an arithmetic number, because the mean of its divisors is an integer number (3864140181).

Almost surely, 2^7728280361 is an apocalyptic number.

It is an amenable number.

7728280361 is a deficient number, since it is larger than the sum of its proper divisors (1).

7728280361 is an equidigital number, since it uses as much as digits as its factorization.

7728280361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 7728280361 is about 87910.6384972831. The cubic root of 7728280361 is about 1977.0953874663.

The spelling of 7728280361 in words is "seven billion, seven hundred twenty-eight million, two hundred eighty thousand, three hundred sixty-one".