1028420779 has 2 divisors, whose sum is σ = 1028420780. Its totient is φ = 1028420778.

The previous prime is 1028420749. The next prime is 1028420803. The reversal of 1028420779 is 9770248201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1028420779 - 2²³ = 1020032171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1028420719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514210389 + 514210390.

It is an arithmetic number, because the mean of its divisors is an integer number (514210390).

Almost surely, 2^1028420779 is an apocalyptic number.

1028420779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028420779 is an equidigital number, since it uses as much as digits as its factorization.

1028420779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1028420779 is about 32069.0002806449. Note that the first 3 decimals coincide. The cubic root of 1028420779 is about 1009.3852348089.

The spelling of 1028420779 in words is "one billion, twenty-eight million, four hundred twenty thousand, seven hundred seventy-nine".