628768771 has 2 divisors, whose sum is σ = 628768772. Its totient is φ = 628768770.

The previous prime is 628768769. The next prime is 628768781. The reversal of 628768771 is 177867826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628768771 - 2¹ = 628768769 is a prime.

Together with 628768769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (628768781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314384385 + 314384386.

It is an arithmetic number, because the mean of its divisors is an integer number (314384386).

Almost surely, 2^628768771 is an apocalyptic number.

628768771 is a deficient number, since it is larger than the sum of its proper divisors (1).

628768771 is an equidigital number, since it uses as much as digits as its factorization.

628768771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 52.

The square root of 628768771 is about 25075.2621322290. The cubic root of 628768771 is about 856.7030659908.

The spelling of 628768771 in words is "six hundred twenty-eight million, seven hundred sixty-eight thousand, seven hundred seventy-one".