628267811 has 2 divisors, whose sum is σ = 628267812. Its totient is φ = 628267810.

The previous prime is 628267799. The next prime is 628267819. The reversal of 628267811 is 118762826.

628267811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628267811 - 2¹⁴ = 628251427 is a prime.

It is not a weakly prime, because it can be changed into another prime (628267819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314133905 + 314133906.

It is an arithmetic number, because the mean of its divisors is an integer number (314133906).

Almost surely, 2^628267811 is an apocalyptic number.

628267811 is a deficient number, since it is larger than the sum of its proper divisors (1).

628267811 is an equidigital number, since it uses as much as digits as its factorization.

628267811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 628267811 is about 25065.2710138949. The cubic root of 628267811 is about 856.4754847150.

The spelling of 628267811 in words is "six hundred twenty-eight million, two hundred sixty-seven thousand, eight hundred eleven".