1428288509 has 2 divisors, whose sum is σ = 1428288510. Its totient is φ = 1428288508.

The previous prime is 1428288493. The next prime is 1428288517. The reversal of 1428288509 is 9058828241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900300025 + 527988484 = 30005^2 + 22978^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428288509 - 2⁴ = 1428288493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428228509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714144254 + 714144255.

It is an arithmetic number, because the mean of its divisors is an integer number (714144255).

Almost surely, 2^1428288509 is an apocalyptic number.

It is an amenable number.

1428288509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428288509 is an equidigital number, since it uses as much as digits as its factorization.

1428288509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 1428288509 is about 37792.7044414659. The cubic root of 1428288509 is about 1126.1735267692.

The spelling of 1428288509 in words is "one billion, four hundred twenty-eight million, two hundred eighty-eight thousand, five hundred nine".