628305577 has 2 divisors, whose sum is σ = 628305578. Its totient is φ = 628305576.

The previous prime is 628305529. The next prime is 628305581. The reversal of 628305577 is 775503826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365995161 + 262310416 = 19131^2 + 16196^2 .

It is a cyclic number.

It is not a de Polignac number, because 628305577 - 2¹⁵ = 628272809 is a prime.

It is not a weakly prime, because it can be changed into another prime (628305077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314152788 + 314152789.

It is an arithmetic number, because the mean of its divisors is an integer number (314152789).

Almost surely, 2^628305577 is an apocalyptic number.

It is an amenable number.

628305577 is a deficient number, since it is larger than the sum of its proper divisors (1).

628305577 is an equidigital number, since it uses as much as digits as its factorization.

628305577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 628305577 is about 25066.0243556891. The cubic root of 628305577 is about 856.4926456584.

The spelling of 628305577 in words is "six hundred twenty-eight million, three hundred five thousand, five hundred seventy-seven".