1428840011 has 2 divisors, whose sum is σ = 1428840012. Its totient is φ = 1428840010.

The previous prime is 1428839927. The next prime is 1428840019. The reversal of 1428840011 is 1100488241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1428840011 - 2¹⁰ = 1428838987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1428840019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714420005 + 714420006.

It is an arithmetic number, because the mean of its divisors is an integer number (714420006).

Almost surely, 2^1428840011 is an apocalyptic number.

1428840011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428840011 is an equidigital number, since it uses as much as digits as its factorization.

1428840011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 1428840011 is about 37800.0001455026. Note that the first 3 decimals coincide. The cubic root of 1428840011 is about 1126.3184571120.

The spelling of 1428840011 in words is "one billion, four hundred twenty-eight million, eight hundred forty thousand, eleven".