628811 has 2 divisors, whose sum is σ = 628812. Its totient is φ = 628810.

The previous prime is 628801. The next prime is 628819. The reversal of 628811 is 118826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628811 - 2¹⁰ = 627787 is a prime.

It is not a weakly prime, because it can be changed into another prime (628819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314405 + 314406.

It is an arithmetic number, because the mean of its divisors is an integer number (314406).

2⁶²⁸⁸¹¹ is an apocalyptic number.

628811 is a deficient number, since it is larger than the sum of its proper divisors (1).

628811 is an equidigital number, since it uses as much as digits as its factorization.

628811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 26.

The square root of 628811 is about 792.9760399911. The cubic root of 628811 is about 85.6722244691.

The spelling of 628811 in words is "six hundred twenty-eight thousand, eight hundred eleven".