1428306839 has 2 divisors, whose sum is σ = 1428306840. Its totient is φ = 1428306838.

The previous prime is 1428306827. The next prime is 1428306853. The reversal of 1428306839 is 9386038241.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428306839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1428306839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428306889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714153419 + 714153420.

It is an arithmetic number, because the mean of its divisors is an integer number (714153420).

Almost surely, 2^1428306839 is an apocalyptic number.

1428306839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428306839 is an equidigital number, since it uses as much as digits as its factorization.

1428306839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 1428306839 is about 37792.9469478102. The cubic root of 1428306839 is about 1126.1783443468.

The spelling of 1428306839 in words is "one billion, four hundred twenty-eight million, three hundred six thousand, eight hundred thirty-nine".