628228859 has 2 divisors, whose sum is σ = 628228860. Its totient is φ = 628228858.

The previous prime is 628228847. The next prime is 628228879. The reversal of 628228859 is 958822826.

628228859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628228859 - 2²⁸ = 359793403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628228879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314114429 + 314114430.

It is an arithmetic number, because the mean of its divisors is an integer number (314114430).

Almost surely, 2^628228859 is an apocalyptic number.

628228859 is a deficient number, since it is larger than the sum of its proper divisors (1).

628228859 is an equidigital number, since it uses as much as digits as its factorization.

628228859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 50.

The square root of 628228859 is about 25064.4939905038. The cubic root of 628228859 is about 856.4577841304.

The spelling of 628228859 in words is "six hundred twenty-eight million, two hundred twenty-eight thousand, eight hundred fifty-nine".