628447 has 2 divisors, whose sum is σ = 628448. Its totient is φ = 628446.

The previous prime is 628427. The next prime is 628477. The reversal of 628447 is 744826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628447 - 2⁷ = 628319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314223 + 314224.

It is an arithmetic number, because the mean of its divisors is an integer number (314224).

2⁶²⁸⁴⁴⁷ is an apocalyptic number.

628447 is a deficient number, since it is larger than the sum of its proper divisors (1).

628447 is an equidigital number, since it uses as much as digits as its factorization.

628447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 31.

The square root of 628447 is about 792.7464916353. The cubic root of 628447 is about 85.6556902435.

The spelling of 628447 in words is "six hundred twenty-eight thousand, four hundred forty-seven".