428220502849 has 2 divisors, whose sum is σ = 428220502850. Its totient is φ = 428220502848.

The previous prime is 428220502783. The next prime is 428220502867. The reversal of 428220502849 is 948205022824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338584334400 + 89636168449 = 581880^2 + 299393^2 .

It is a cyclic number.

It is not a de Polignac number, because 428220502849 - 2²³ = 428212114241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428220502799 and 428220502808.

It is not a weakly prime, because it can be changed into another prime (428227502849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214110251424 + 214110251425.

It is an arithmetic number, because the mean of its divisors is an integer number (214110251425).

Almost surely, 2^428220502849 is an apocalyptic number.

It is an amenable number.

428220502849 is a deficient number, since it is larger than the sum of its proper divisors (1).

428220502849 is an equidigital number, since it uses as much as digits as its factorization.

428220502849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 737280, while the sum is 46.

The spelling of 428220502849 in words is "four hundred twenty-eight billion, two hundred twenty million, five hundred two thousand, eight hundred forty-nine".