1428306239 has 2 divisors, whose sum is σ = 1428306240. Its totient is φ = 1428306238.

The previous prime is 1428306223. The next prime is 1428306251. The reversal of 1428306239 is 9326038241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1428306239 - 2⁴ = 1428306223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428306839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714153119 + 714153120.

It is an arithmetic number, because the mean of its divisors is an integer number (714153120).

Almost surely, 2^1428306239 is an apocalyptic number.

1428306239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428306239 is an equidigital number, since it uses as much as digits as its factorization.

1428306239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 1428306239 is about 37792.9390098203. The cubic root of 1428306239 is about 1126.1781866526.

The spelling of 1428306239 in words is "one billion, four hundred twenty-eight million, three hundred six thousand, two hundred thirty-nine".