628868827 has 2 divisors, whose sum is σ = 628868828. Its totient is φ = 628868826.

The previous prime is 628868803. The next prime is 628868861. The reversal of 628868827 is 728868826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628868827 - 2⁷ = 628868699 is a prime.

It is not a weakly prime, because it can be changed into another prime (628868887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314434413 + 314434414.

It is an arithmetic number, because the mean of its divisors is an integer number (314434414).

Almost surely, 2^628868827 is an apocalyptic number.

628868827 is a deficient number, since it is larger than the sum of its proper divisors (1).

628868827 is an equidigital number, since it uses as much as digits as its factorization.

628868827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4128768, while the sum is 55.

The square root of 628868827 is about 25077.2571666042. The cubic root of 628868827 is about 856.7485059785.

Subtracting 628868827 from its reverse (728868826), we obtain a palindrome (99999999).

The spelling of 628868827 in words is "six hundred twenty-eight million, eight hundred sixty-eight thousand, eight hundred twenty-seven".