628315439 has 2 divisors, whose sum is σ = 628315440. Its totient is φ = 628315438.

The previous prime is 628315339. The next prime is 628315459. The reversal of 628315439 is 934513826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628315439 - 2²⁸ = 359879983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628315396 and 628315405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628315459) 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, 314157719 + 314157720.

It is an arithmetic number, because the mean of its divisors is an integer number (314157720).

Almost surely, 2^628315439 is an apocalyptic number.

628315439 is a deficient number, since it is larger than the sum of its proper divisors (1).

628315439 is an equidigital number, since it uses as much as digits as its factorization.

628315439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 628315439 is about 25066.2210753835. The cubic root of 628315439 is about 856.4971268570.

The spelling of 628315439 in words is "six hundred twenty-eight million, three hundred fifteen thousand, four hundred thirty-nine".