628824871 has 2 divisors, whose sum is σ = 628824872. Its totient is φ = 628824870.

The previous prime is 628824869. The next prime is 628824881. The reversal of 628824871 is 178428826.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628824871 - 2¹ = 628824869 is a prime.

Together with 628824869, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628824881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314412435 + 314412436.

It is an arithmetic number, because the mean of its divisors is an integer number (314412436).

Almost surely, 2^628824871 is an apocalyptic number.

628824871 is a deficient number, since it is larger than the sum of its proper divisors (1).

628824871 is an equidigital number, since it uses as much as digits as its factorization.

628824871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 344064, while the sum is 46.

The square root of 628824871 is about 25076.3807396522. The cubic root of 628824871 is about 856.7285441501.

The spelling of 628824871 in words is "six hundred twenty-eight million, eight hundred twenty-four thousand, eight hundred seventy-one".