428220116789 has 2 divisors, whose sum is σ = 428220116790. Its totient is φ = 428220116788.

The previous prime is 428220116759. The next prime is 428220116851. The reversal of 428220116789 is 987611022824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284044229764 + 144175887025 = 532958^2 + 379705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428220116789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428220116759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214110058394 + 214110058395.

It is an arithmetic number, because the mean of its divisors is an integer number (214110058395).

Almost surely, 2^428220116789 is an apocalyptic number.

It is an amenable number.

428220116789 is a deficient number, since it is larger than the sum of its proper divisors (1).

428220116789 is an equidigital number, since it uses as much as digits as its factorization.

428220116789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 428220116789 in words is "four hundred twenty-eight billion, two hundred twenty million, one hundred sixteen thousand, seven hundred eighty-nine".