628302457 has 2 divisors, whose sum is σ = 628302458. Its totient is φ = 628302456.

The previous prime is 628302449. The next prime is 628302503. The reversal of 628302457 is 754203826.

628302457 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 can be written as a sum of positive squares in only one way, i.e., 455011561 + 173290896 = 21331^2 + 13164^2 .

It is a cyclic number.

It is not a de Polignac number, because 628302457 - 2³ = 628302449 is a prime.

It is not a weakly prime, because it can be changed into another prime (628302407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314151228 + 314151229.

It is an arithmetic number, because the mean of its divisors is an integer number (314151229).

Almost surely, 2^628302457 is an apocalyptic number.

It is an amenable number.

628302457 is a deficient number, since it is larger than the sum of its proper divisors (1).

628302457 is an equidigital number, since it uses as much as digits as its factorization.

628302457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 628302457 is about 25065.9621199746. The cubic root of 628302457 is about 856.4912279504.

The spelling of 628302457 in words is "six hundred twenty-eight million, three hundred two thousand, four hundred fifty-seven".