628832557 has 2 divisors, whose sum is σ = 628832558. Its totient is φ = 628832556.

The previous prime is 628832527. The next prime is 628832629. The reversal of 628832557 is 755238826.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 559842921 + 68989636 = 23661^2 + 8306^2 .

It is a cyclic number.

It is not a de Polignac number, because 628832557 - 2⁷ = 628832429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628832527) 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, 314416278 + 314416279.

It is an arithmetic number, because the mean of its divisors is an integer number (314416279).

Almost surely, 2^628832557 is an apocalyptic number.

It is an amenable number.

628832557 is a deficient number, since it is larger than the sum of its proper divisors (1).

628832557 is an equidigital number, since it uses as much as digits as its factorization.

628832557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 46.

The square root of 628832557 is about 25076.5339909645. The cubic root of 628832557 is about 856.7320346761.

The spelling of 628832557 in words is "six hundred twenty-eight million, eight hundred thirty-two thousand, five hundred fifty-seven".