428857811 has 2 divisors, whose sum is σ = 428857812. Its totient is φ = 428857810.

The previous prime is 428857789. The next prime is 428857841. The reversal of 428857811 is 118758824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428857811 - 2¹⁰ = 428856787 is a prime.

It is not a weakly prime, because it can be changed into another prime (428857841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214428905 + 214428906.

It is an arithmetic number, because the mean of its divisors is an integer number (214428906).

Almost surely, 2^428857811 is an apocalyptic number.

428857811 is a deficient number, since it is larger than the sum of its proper divisors (1).

428857811 is an equidigital number, since it uses as much as digits as its factorization.

428857811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143360, while the sum is 44.

The square root of 428857811 is about 20708.8824179384. The cubic root of 428857811 is about 754.1153394139.

The spelling of 428857811 in words is "four hundred twenty-eight million, eight hundred fifty-seven thousand, eight hundred eleven".